Opencode Zen critical errors on Muse Spark family when model recieves a image/does a tool call

[pompompur-in]

Description

Error: Error from provider (Console): Upstream request failed: [invalid_request_error] reasoning encrypted_content was not issued to this caller when requesting any Muse Spark model on Zen.

Plugins

None

OpenCode version

0.0.0-beta-18050

Steps to reproduce

Make a request to any Muse Spark model, and attach a image or get it to read a file.

Screenshot and/or share link

Operating System

Windows 11 25H2, build 26200.9445

Terminal

Windows Terminal

[pompompur-in]

This also affects OpenCode version 1.18.30

https://opncd.ai/share/CGqRyjoi

[pompompur-in]

I have confirmed that this is a Zen upstream issue, and is not local.

[pompompur-in]

On some responses, I experience this issue, however some are succeeding right now

[rekram1-node]

so far can't reproduce...

[renhiyama]

I am also getting same error right now. opencode v1.18.30

[Overlordshor]

Still reproduces on 1.18.30, OpenCode Desktop, Windows 11.

• model: muse-spark-1.3-contributor-free via Console (Zen), Meta Muse Spark
• session ses_f669f220cffeXi8TfKAMDScGtv, first fail 2026-09-13T06:20:52Z, then sticky on every retry in the same session
• error: Error from provider (Console): Upstream request failed: [invalid_request_error] reasoning 'encrypted_content' was not issued to this caller
• other model (Mimo) works fine in the same setup

Filtered excerpt from ~/.local/share/opencode/log/opencode.log for this session attached

muse-spark-encrypted-content-ses_f669f220.txt

[AshutoshGitMirror]

I am getting it on arch linux, with muse. And it's effecting old chats too. On 1.18.29.

[CoGian]

started for me too same windows on OpenCode 1.18.30. Same error: Error from provider (Console): Upstream request failed: [invalid_request_error] reasoning encrypted_content was not issued to this caller

[fareslassoued]

also here, it happens when resuming a session. But not with new sessions.

[pegasusearl]

Getting same error on Muse Spark 1.3 free. Using OpenCode Desktop on Windows, and using ACP with Zed Editor (also on Windows). Same problem.
Fixed by creating new session, but even on this new session it will have this problem again so I can't have long sessions.

On session that faces this issue, can change model and it will continue to work (can't use muse spark anymore there though)

[FelipeFMAvelar]

I have the same issue. NixOS, 1.18.30.

[arthiccc]

same here. windows 10 LTSC

Version: 1.18.30 (latest)
Date: 2026-09-13T15:01:08.385Z
OS: Linux 5.15.153.1-microsoft-standard-WSL2 (x64)
Terminal: xterm-256color
Session ID: ses_f64ffe89bffe45X3BTcCwd09lP
Model: opencode/muse-spark-1.3-contributor-free

[unurgunite]

Same root cause as #43557: after a restart, OpenCode replays the stale reasoning.encrypted_content blob (bound to the previous caller/key) and upstream rejects it with not issued to this caller. New chats work because they carry no stale blob.

I wrote a shim plugin that strips blobs older than the current server process before each request, keeping text summaries: https://github.com/unurgunite/opencode-sanitize-reasoning

My dead chats work again from the first message. Proper fix still belongs in core (drop + retry without the blob on invalid_encrypted_content).