[web/desktop] current / commands with parameters like /spoiler break when trying to add a new line with shift + enter

(#3590) Bug Confirmed Priority: P2 markdown messaging

Observed behaviour

what happend: visual bugs (see attachment) what should happen: support for newlines in command parameters or just refusing the newline altogether

Reproduction steps

  1. use the /me or /spoiler cmd on web/desktop
  2. type something into the parameter box
  3. press shift + enter (either at the end of the parameter box or between some characters)
  4. observe visual bugs

Build information

Canary Desktop 2026.1006.171724, Web 2026.1006.190110, Windows 11 10.0.26200 (x64), Electron 44.4.1, Chrome 152.0.7977.78, Node 24.21.0, Locale en-US

Platform

Web

Bildschirmaufnahme 2026-10-07 115419.mp4 | 4.8 MB
  1. bizo changed the status from Needs triage to Confirmed

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