[Bug] IME pre-edit text not displayed in tmux over SSH due to cursor position issue

Bug Description
(IME) pre-edit text not shown in CLI over wezterm + ssh + tmux due to broken cursor position: i use claude code on ubuntu with tmux over ssh via wezterm on windows. When typing Japanese we want to see pre-edit texts before confirming it by pressing space or tab. In most cases cc works fine though, in the case i found the internal cursor position may be broken hence no sight of pre-edit texts (or, left/right bottom corner).

Environment Info

• Platform: linux
• Terminal: tmux
• Version: 2.1.139
• Feedback ID: 7c543d02-c74d-4f47-93dd-0e53e1ad66ee

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/shkoni/.local/share/claude/versions/2.1.139 (expected in multi-process scenarios)\n    at A18 (/$bunfs/root/src/entrypoints/cli.js:2664:2257)\n    at eTH (/$bunfs/root/src/entrypoints/cli.js:2664:1337)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-12T06:47:02.501Z"}]