[BUG] Claude Desktop: Send button silently fails - message disappears when context is high

[ThatDragonOverThere]

Description

When context usage is high (near compacting threshold), clicking the send button appears to work momentarily but then silently fails - the UI reverts to the state before sending, as if the message was never submitted. No error message is displayed.

Steps to Reproduce

1. Use Claude Desktop until context usage is high (near auto-compact threshold)
2. Type a message and click send (arrow button)
3. Observe: UI "resolves" for a second, then reverts to pre-send state
4. Message is gone, no error shown

Expected Behavior

Either:

• The message should send successfully, OR
• An error message should appear (e.g., "Context limit reached - /compact or /clear to continue")

Actual Behavior

• Send button click appears to work briefly
• UI then silently reverts to state before sending
• No message appears in conversation
• No error message displayed
• User left wondering what happened

Environment

• Platform: Windows
• Application: Claude Desktop (GUI app)

Notes

This may be related to context/compacting issues but the silent failure with no error is the core UX problem. Users should never have a message silently disappear without feedback.

Possibly Related Issues

• [BUG] Autocompact not triggering at high context usage (90%+) #17292 - Autocompact not triggering at high context usage
• [BUG] Claude Desktop: Chat rollbacks/disappearing responses when using MCP tools #16937 - Chat rollbacks/disappearing responses (closed as dup of [BUG] Claude Desktop Drops/Reverts Long Multi-Step Tasks Without Warning #10065)
• Context display shows 15% free but reports 'Context limit reached' #18178 - Context percentage mismatch

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Conversation compaction intermittently corrupts conversation state: “Compaction failed unexpectedly” and silent prompt submission failures #18482
2. [BUG] Claude Desktop Drops/Reverts Long Multi-Step Tasks Without Warning #10065
3. Last message in conversation can disappear #18568

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🤖 Generated with Claude Code

[solangerainha]

This is happening on the web as well. On mobile it does return the "limit reached" error, at least from my testing.

Seems like the auto compacting isn't working at all for Claude.ai, even though they flagged yesterday's issue as resolved.

[siberianwm]

Exactly same problem. Began after 14 jan downtime or after last client updates, im not sure. This is totally breaks chat, impossible to continue. Editing previous message and its resend it works, but next one fails again. This is critical bug which breaks almost all chats.

Few days ago there was problem with compacting, it's just not being triggired with message "conext limit reached. start new chat" (check status.claude.com) and anthropic fixed it, now it's triggering but silently fails. Maybe this fix is source of this new bug?

[lichtpfad]

Same here! Break all my work right now!
happens alsreay for several days

[ThatDragonOverThere]

Confirming this is reproducible - happened again within the same session. The silent failure occurs repeatedly when context is high. No error message, just the UI reverting as if send was never clicked.

[siberianwm]

This needs to be fixed as soon as possible. It's incredibly annoying. Bug is critical. Breaks almost every chat!

[ThatDragonOverThere]

Also experiencing this on the iPhone app - same silent failure behavior. Send button appears to work briefly, then reverts as if nothing was sent. No error message. This is cross-platform, not just Desktop on Windows.

[zhanglaosang]

I had the same problem. Same problem on desktop, mobile (iOS) and web.
Is there a way to recover?

[burakimen]

I've got the same problem while using Claude Desktop app on macOS and Claude Web on Safari. The thing is it seems there is no problem like this while using Claude Code in VSCode app. I'm not sure 100% but same issue persist in Xcode also.

PS: Resetting Mac not helping.

[ThatDragonOverThere]

Another occurrence on Desktop. This is now the 4th instance reported in one session. Highly reproducible.