[Channels] onSubmit early return due to "suggestions showing" causes input to silently disappear

Bug description

When running Claude Code with --channels flag, typing any message and pressing Enter causes the input to silently disappear without being submitted. Claude Code does not respond at all.

Steps to reproduce

claude --channels plugin:telegram@claude-plugins-official --dangerously-skip-permissions --disallowedTools "AskUserQuestion,EnterPlanMode" --debug-file /tmp/channels-debug.log

1. Type any message in the prompt
2. Press Enter
3. The message disappears from the prompt but Claude does not process it

Debug log evidence

The debug log shows this pattern repeatedly:

[onSubmit] early return: suggestions showing (count=10)

The onSubmit handler detects that autocomplete suggestions are showing (count=10) and treats Enter as a suggestion selection rather than a message submission. The input text is consumed/cleared but never sent.

Additional context

• Claude Code version: 2.1.83
• Platform: macOS (Darwin 25.4.0)
• Terminal: tmux 3.6a
• The issue also occurs alongside a secondary problem where the Telegram MCP server fails to reconnect on restart (MCP error -32000: Connection closed after ~90ms), but the input-swallowing issue is independent.

Workaround

Pressing Escape before Enter to dismiss the suggestions dropdown allows the message to submit normally.