[Bug] Model fallback to Opus despite Sonnet configuration causing rate limits

Bug Description
I frecuently get ⏺ Claude Opus limit reached, now using Sonnet 4.5, but my model is set to Sonnet, i upgraded to Max to no hit limit, but i feels like under the hood is doing something with Opus.

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.0.36
• Feedback ID: 9c844bf9-57bf-45eb-9d56-aceefca571a1

Errors

[{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:03:56.879Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:34:00.278Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:42:21.599Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:46:26.579Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:47:31.323Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:49:37.468Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:50:17.697Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:52:46.970Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T15:57:06.477Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T16:01:45.808Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T16:31:46.030Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T17:01:46.791Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T17:31:59.900Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T18:02:51.903Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-10T18:32:51.674Z"},{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:82:11838)\n    at O (/$bunfs/root/claude:81:5167)\n    at <anonymous> (node:fs:243:13)\n    at processTicksAndRejecti

Note: Error logs were truncated.