[Bug] Muse Spark 1.3 Free (Xhigh): reasoning encrypted_content error on follow-up prompts with images

[BishanSingh246]

Description

I am receiving the error: Upstream request failed: [invalid_request_error] reasoning 'encrypted_content' was not issued to this caller. This happens after 2-3 messages in a new session, maybe when attaching images to a follow-up prompt. The session has heavy tool usage (over 106,000 cache tokens read), and the context limits seem to break the token validation upstream when processing the subsequent message.

Note: Similar reports have been marked as 'closed as not planned' by automated triage, but this issue remains strictly reproducible in v1.18.30.

Plugins

None

OpenCode version

v1.18.30

Steps to reproduce

1. Open a project in OpenCode Desktop (v1.18.30) using OpenCode Zen provider.
2. Select the "Muse Spark 1.3 Free" model and set the variant to Xhigh.
3. Send an initial prompt that triggers multiple tool calls (e.g., shell commands) and builds a large cache (100k+ tokens).
4. Send a 2nd or 3rd follow-up prompt in the same session, attaching screenshots to the message.
5. The upstream encrypted_content error immediately occurs, blocking the response.

Screenshot and/or share link

Attached exported session logs:
new-session---2026-09-14t05-56-06-838z.json

Operating System

Windows 11

Terminal

OpenCode Built-in Terminal (PowerShell)

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Bug] muse-spark-1.3-contributor-free: reasoning encrypted_content was not issued to this caller when switching models in same session #48805: Same reasoning encrypted_content was not issued to this caller error on Muse Spark 1.3 (triggered by model switching in same session)
• Muse Spark 1.3: resuming a session after idle fails with reasoning encrypted_content not issued to this caller #48915: Same error on Muse Spark 1.3 when resuming a session after idle
• Opencode Zen critical errors on Muse Spark family when model recieves a image/does a tool call #48741: Opencode Zen critical errors on Muse Spark family when model receives an image or does a tool call
• muse spark 1.3 Free [invalid_request_error] reasoning encrypted_content was not issued to this caller #48742: Identical error message reasoning encrypted_content was not issued to this caller on Muse Spark 1.3 Free (closed)
• provider: stale composite reasoning item id (rs_A:rs_B) replayed after restart → invalid_request_error #48319: Stale composite reasoning item id replayed after restart → same invalid_request_error

[VishvakR]

this is the same stale reasoning replay as #48741 / #48915, the stored encrypted_content gets sent back and the upstream rejects it. there's already an open fix for the 1.18 line in #48918 (drops the encrypted reasoning and retries the turn once when that error comes back), and #48908 does the same on v2, so probably easiest to follow those.