[Bug] Anthropic API Error: 400 Bad Request with Claude Sonnet

Bug Description
I get 400 errors after conversations. I don't see signs of compactation, and was using sonnet, not Opus. Still it looks similar to issue #12311. So I'm following the advice there and file feedback.

Environment Info

• Platform: win32
• Terminal: null
• Version: 2.1.29
• Feedback ID: 5a156c1d-021b-40b5-b0d8-862cf924374b

Errors

[{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:02.237Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:02.238Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:02.240Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:02.241Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:43.830Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:43.831Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/claude.exe:1481:107)\n    at aGI (B:/~BUN/root/claude.exe:2171:123)\n    at YeD (B:/~BUN/root/claude.exe:1700:2302)\n    at i9 (B:/~BUN/root/claude.exe:690:20681)\n    at hV (B:/~BUN/root/claude.exe:690:38949)\n    at Ss (B:/~BUN/root/claude.exe:690:49471)\n    at py (B:/~BUN/root/claude.exe:690:85493)\n    at ps (B:/~BUN/root/claude.exe:690:84475)\n    at im (B:/~BUN/root/claude.exe:690:84301)","timestamp":"2026-02-03T10:32:43.832Z"},{"error":"Error: String not found in file. Failed to apply edit.\n    at $RH (B:/~BUN/root/claude.exe:1481:731)\n    at gX$ (B:/~BUN/root/…

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