diff --git a/service/reader/service.go b/service/reader/service.go
index 56074977..7cfaa790 100644
--- a/service/reader/service.go
+++ b/service/reader/service.go
@@ -4,9 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
-	"os"
 	"reflect"
-	"runtime/debug"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -37,14 +35,6 @@ type Service struct {
 
 // ReadInto reads Data into provided destination, * dDest` is required. It has to be a pointer to `interface{}` or pointer to slice of `T` or `*T`
 func (s *Service) ReadInto(ctx context.Context, dest interface{}, aView *view.View, opts ...Option) error {
-	if os.Getenv("DATLY_DEBUG_READER") == "1" {
-		defer func() {
-			if r := recover(); r != nil {
-				fmt.Printf("[READER DEBUG] panic view=%s dest=%T err=%v\n%s\n", aView.Name, dest, r, debug.Stack())
-				panic(r)
-			}
-		}()
-	}
 	session, err := NewSession(dest, aView, opts...)
 	if err != nil {
 		return err
@@ -287,10 +277,9 @@ func (s *Service) readObjects(ctx context.Context, session *Session, batchData *
 }
 
 func (s *Service) querySummary(ctx context.Context, session *Session, aView *view.View, statelet *view.Statelet, batchDataCopy *view.BatchData, collector *view.Collector, parentViewMetaParam *expand.ViewContext) (*response.SQLExecution, error) {
-	selectorDeref := *statelet
-	selectorDeref.Fields = []string{}
-	selectorDeref.Columns = []string{}
-	selector := &selectorDeref
+	selector := statelet.CloneForSummary()
+	selector.Fields = []string{}
+	selector.Columns = []string{}
 
 	var indexed *cache.ParmetrizedQuery
 	var cacheStats *cache.Stats
@@ -430,9 +419,6 @@ func (s *Service) BuildCriteria(ctx context.Context, value interface{}, options
 }
 
 func (s *Service) queryInBatches(ctx context.Context, session *Session, aView *view.View, collector *view.Collector, visitor view.VisitorFn, info *response.SQLExecutions, batchData *view.BatchData, selector *view.Statelet) error {
-	if os.Getenv("DATLY_DEBUG_QUERY_HANDLER") == "1" {
-		fmt.Printf("[QUERY DEBUG] queryInBatches view=%s selectorTemplateNil=%v batchValues=%d\n", aView.Name, selector == nil || selector.Template == nil, len(batchData.ValuesBatch))
-	}
 	wg := &sync.WaitGroup{}
 	db, err := aView.Db()
 	if err != nil {
@@ -471,19 +457,10 @@ func (s *Service) queryObjects(ctx context.Context, session *Session, aView *vie
 		return s.queryWithPartitions(ctx, session, aView, selector, batchData, db, collector, visitor, partitioned)
 	}
 	readData := 0
-	if os.Getenv("DATLY_DEBUG_QUERY_HANDLER") == "1" {
-		fmt.Printf("[QUERY DEBUG] queryObjects view=%s schema=%v slice=%v collectorView=%s\n", aView.Name, aView.Schema.Type(), aView.Schema.SliceType(), collector.View().Name)
-	}
 	parametrizedSQL, columnInMatcher, err := s.buildParametrizedSQL(ctx, aView, selector, batchData, collector, session, nil)
 	if err != nil {
-		if os.Getenv("DATLY_DEBUG_QUERY_HANDLER") == "1" {
-			fmt.Printf("[QUERY DEBUG] buildParametrizedSQL error view=%s err=%v\n", aView.Name, err)
-		}
 		return nil, err
 	}
-	if os.Getenv("DATLY_DEBUG_QUERY_HANDLER") == "1" {
-		fmt.Printf("[QUERY DEBUG] builtSQL view=%s sql=%s args=%#v\n", aView.Name, parametrizedSQL.SQL, parametrizedSQL.Args)
-	}
 
 	var parentProvider func(value interface{}) (interface{}, error)
 	handler := func(row interface{}) error {
@@ -505,7 +482,8 @@ func (s *Service) queryObjects(ctx context.Context, session *Session, aView *vie
 		}
 		return visitor(row)
 	}
-	return s.queryWithHandler(ctx, session, aView, collector, columnInMatcher, parametrizedSQL, db, handler, &readData)
+	execs, err := s.queryWithHandler(ctx, session, aView, collector, columnInMatcher, parametrizedSQL, db, handler, &readData)
+	return execs, err
 }
 
 func (s *Service) getParentContext(ctx context.Context, row interface{}, collector *view.Collector, parentProvider func(value interface{}) (interface{}, error)) (context.Context, error) {
@@ -548,9 +526,6 @@ func (s *Service) queryWithHandler(ctx context.Context, session *Session, aView
 
 	stats, onDone := NewExecutionInfo(parametrizedSQL, cacheStats, collector)
 	defer onDone()
-	if os.Getenv("DATLY_DEBUG_QUERY_HANDLER") == "1" {
-		fmt.Printf("[QUERY HANDLER] view=%s sql=%s args=%#v\n", aView.Name, parametrizedSQL.SQL, parametrizedSQL.Args)
-	}
 	if session.DryRun {
 		return []*response.SQLExecution{stats}, nil
 	}
@@ -580,16 +555,7 @@ BEGIN:
 		}
 		_ = stmt.Close()
 	}()
-	debugHandler := handler
-	if os.Getenv("DATLY_DEBUG_QUERY_HANDLER") == "1" {
-		debugHandler = func(row interface{}) error {
-			fmt.Printf("[QUERY HANDLER] view=%s before unwrap row=%T readData=%d\n", aView.Name, row, *readData)
-			err := handler(row)
-			fmt.Printf("[QUERY HANDLER] view=%s after handler row=%T readData=%d err=%v\n", aView.Name, row, *readData, err)
-			return err
-		}
-	}
-	err = reader.QueryAll(ctx, debugHandler, parametrizedSQL.Args...)
+	err = reader.QueryAll(ctx, handler, parametrizedSQL.Args...)
 
 	isInvalidConnection = err != nil && strings.Contains(err.Error(), "invalid connection")
 	if isInvalidConnection && atomic.AddUint32(&retires, 1) < 3 {
diff --git a/view/state.go b/view/state.go
index a187cd4b..370b9d38 100644
--- a/view/state.go
+++ b/view/state.go
@@ -151,3 +151,44 @@ func (s *State) Init(aView *View) {
 func (s *Statelet) IgnoreRead() {
 	s.Ignore = true
 }
+
+// CloneForSummary creates a lock-safe copy of Statelet state for summary/meta work.
+// It intentionally does not copy mutex or lock-owner bookkeeping.
+func (s *Statelet) CloneForSummary() *Statelet {
+	if s == nil {
+		return NewStatelet()
+	}
+
+	ret := &Statelet{
+		DatabaseFormat: s.DatabaseFormat,
+		OutputFormat:   s.OutputFormat,
+		Template:       s.Template,
+		QuerySelector:  s.QuerySelector,
+		QuerySettings:  s.QuerySettings,
+		initialized:    s.initialized,
+		result:         s.result,
+		Ignore:         s.Ignore,
+	}
+
+	if s._columnNames != nil {
+		ret._columnNames = make(map[string]bool, len(s._columnNames))
+		for k, v := range s._columnNames {
+			ret._columnNames[k] = v
+		}
+	} else {
+		ret._columnNames = map[string]bool{}
+	}
+
+	if len(s.Filters) > 0 {
+		ret.Filters = append(predicate.Filters(nil), s.Filters...)
+	}
+
+	if len(s.Fields) > 0 {
+		ret.Fields = append([]string(nil), s.Fields...)
+	}
+	if len(s.Columns) > 0 {
+		ret.Columns = append([]string(nil), s.Columns...)
+	}
+
+	return ret
+}
diff --git a/view/state/kind/locator/form.go b/view/state/kind/locator/form.go
index 9b37fdb6..b4fee35b 100644
--- a/view/state/kind/locator/form.go
+++ b/view/state/kind/locator/form.go
@@ -77,7 +77,7 @@ func (r *Form) Value(ctx context.Context, rType reflect.Type, name string) (inte
 		if err := r.request.ParseForm(); err != nil {
 			return nil, false, err
 		}
-		values, ok := r.request.Form[name]
+		values, ok = r.request.Form[name]
 		if !ok {
 			return nil, false, nil
 		}
@@ -102,18 +102,26 @@ func NewForm(opts ...Option) (kind.Locator, error) {
 	return ret, nil
 }
 
-// seedFormFromMultipart parses multipart/form-data and copies values into shared maps.
-// Mutex is required because multiple Form locators (one per parameter) can call this
-// concurrently on the same request. Uses form.Values directly instead of form.Set to
-// avoid deadlock (form.Set locks the same mutex).
+// seedFormFromMultipart parses multipart/form-data (if needed) and copies textual values to the shared form
 func (r *Form) seedFormFromMultipart() {
 	if r.request == nil || r.form == nil {
 		return
 	}
+
+	// Session parameter binding runs in parallel. Multipart seeding mutates the
+	// shared form and request maps, so serialize that work under the form mutex.
+	mu := r.form.Mutex()
+	mu.Lock()
+	defer mu.Unlock()
+
 	if r.request.MultipartForm == nil && len(r.form.Values) == 0 {
+		// Only ParseMultipartForm for form-data; other multipart types aren't
+		// supported by ParseMultipartForm. If the shared form already has
+		// values, treat it as authoritative and avoid parsing.
 		ct := r.request.Header.Get("Content-Type")
 		if ct != "" {
 			if mediaType, _, err := mime.ParseMediaType(ct); err == nil && shared.IsFormData(mediaType) {
+				// Use the same default memory threshold as Body locator
 				const maxMultipartMemory = 32 << 20 // 32 MiB
 				_ = r.request.ParseMultipartForm(maxMultipartMemory)
 			}
@@ -122,18 +130,13 @@ func (r *Form) seedFormFromMultipart() {
 	if r.request.MultipartForm == nil {
 		return
 	}
-	// BUG FIX (concurrent map writes):
-	mu := r.form.Mutex()
-	mu.Lock()
-	defer mu.Unlock()
-	if r.request.Form == nil {
-		r.request.Form = url.Values{}
+	if r.form.Values == nil {
+		r.form.Values = url.Values{}
 	}
 	for k, vs := range r.request.MultipartForm.Value {
 		if len(vs) == 0 {
 			continue
 		}
-		r.form.Values[k] = vs
-		r.request.Form[k] = vs
+		r.form.Values[k] = append([]string(nil), vs...)
 	}
 }