[Bug] Slash command prompts prevent multi-line input with Shift+Enter

Bug Description
there is a bug - whenever you text a slash command in a prompt, the input does not allow you to make multiple new-lines, the cursor just freezes when you shift+enter twice+. When there is no slash command, the cursor allows to make multi-new-lines normally. This is reproducable behavior in Ghostty, iTerm2, Vscode - on Mac. check it out, please

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.39
• Feedback ID: 3651e23b-ba30-4e28-b798-fa896654f667

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/bedzhanyan/.local/share/claude/versions/2.1.39 (expected in multi-process scenarios)\n    at uqA (/$bunfs/root/claude:3626:2098)\n    at $hL (/$bunfs/root/claude:3626:1209)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-11T06:07:12.805Z"},{"error":"Error: LSP server plugin:csharp-lsp:csharp-ls failed to start: Executable not found in $PATH: \"csharp-ls\"\n    at start (/$bunfs/root/claude:2115:22315)\n    at async f (/$bunfs/root/claude:2115:24763)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-11T06:07:13.986Z"},{"error":"Error: Executable not found in $PATH: \"csharp-ls\"\n    at spawn (unknown)\n    at spawn (node:child_process:667:35)\n    at spawn (node:child_process:14:39)\n    at start (/$bunfs/root/claude:2115:20845)\n    at f (/$bunfs/root/claude:2115:24763)\n    at I (/$bunfs/root/claude:2115:32525)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-11T06:07:13.988Z"},{"error":"Error: Failed to start LSP server plugin:csharp-lsp:csharp-ls: Executable not found in $PATH: \"csharp-ls\"\n    at <anonymous> (/$bunfs/root/claude:2115:32547)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-11T06:07:13.988Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/claude:358:3940)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-11T06:10:10.070Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/claude:358:3940)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-11T06:13:08.126Z"}]