[Bug] Model performance degradation: repeated errors and poor response quality
Status Open
Reported on v2.1.259
Maintainer reply None cached
Activity 0 comments · opened Sep 4, 2026
Bug Description
i do not kwno what happened but both opus and sonnet performance massively, i can not explain what i want, same errors are repeated, if it will continue like that, next month i will cancel my subscription.
Environment Info
- Platform: win32
- Terminal: vscode
- Version: 2.1.259
- Feedback ID: c5d4de53-144c-4887-b184-6bd37caafcf9
Errors
[{"error":"TelemetrySafeError: VirtualMessageList: itemKeys/messages length desync (keys=22 messages=21 range=[0,22))\n at nHt (B:/~BUN/root/chunk-9891yaqw.js:36:25132)\n at Due (B:/~BUN/root/chunk-9891yaqw.js:36:17978)\n at Oa (B:/~BUN/root/chunk-89zm4j0p.js:18:20034)\n at Au (B:/~BUN/root/chunk-89zm4j0p.js:18:38200)\n at zh (B:/~BUN/root/chunk-89zm4j0p.js:18:84275)\n at bg (B:/~BUN/root/chunk-89zm4j0p.js:18:83275)\n at qu (B:/~BUN/root/chunk-89zm4j0p.js:18:83104)\n at _h (B:/~BUN/root/chunk-89zm4j0p.js:18:79629)\n at je (B:/~BUN/root/chunk-89zm4j0p.js:18:6260)\n at Fe (B:/~BUN/root/chunk-89zm4j0p.js:18:4791)","timestamp":"2026-09-03T18:37:28.528Z"}]