[Bug] Claude drops keystrokes when editing prompts in external editor

Bug Description
When using Ctrl+G to open Neovim to edit the prompt, every few keystrokes is dropped and not correctly included in the prompt. This has been occurring since the move to the bun binary and wasn't happening with the node package. Running npx to launch Claude doesn't have the issue either.

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.0.37
• Feedback ID:

Errors

[{"error":"Error\n    at Kw (/$bunfs/root/claude:59:1142)\n    at <anonymous> (/$bunfs/root/claude:64:10074)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at spawnSync (unknown)\n    at spawnSync (node:child_process:226:22)\n    at execSync (node:child_process:275:109)\n    at T (/$bunfs/root/claude:1312:1602)\n    at kMD (/$bunfs/root/claude:1312:1780)\n    at request (/$bunfs/root/claude:66:2146)\n    at processTicksAndRejections (native:7:39)\n    at spawnSync (unknown)\n    at spawnSync (node:child_process:226:22)\n    at execSync (node:child_process:275:109)\n    at T (/$bunfs/root/claude:1312:1602)\n    at kMD (/$bunfs/root/claude:1312:1780)\n    at SMD (/$bunfs/root/claude:1312:2309)\n    at SMD (/$bunfs/root/claude:1312:2432)\n    at A (/$bunfs/root/claude:11:15230)","timestamp":"2025-11-11T10:22:39.912Z"},{"error":"Error\n    at Kw (/$bunfs/root/claude:59:1142)\n    at <anonymous> (/$bunfs/root/claude:64:10074)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:66:2146)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-11T10:22:50.567Z"}]