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Creating a Group DM (GDM) with someone who has GDM invitations blocked while already being in a GDM with that user causes a hidden 400 error

(#2870) Bug Fixed desktop dms
by Zacy

Observed behaviour

The console shows a 400 error but nothing in the UI indicates it as the GDM creation prompt flashes

Reproduction steps

  1. Users 1, 2 and 3 create a GDM together
  2. User 2 then blocks being invited to GDMs
  3. User 1 tries to create another group with all three users
  4. User 1 gets the warning about the already existing group and clicks Create new group

Build information

Canary Desktop 2026.528.23728, Web 2026.528.195219, Windows 11 10.0.26200 (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-US

Platform

Windows

Details

Expected behaviour Fluxer should show the same prompt as it does when there are no existing GDM which allows you to start a GDM without the person who has GDM invites disabled
GDM_bug.mp4 | 1.0 MB
  1. Rex changed the status from Needs triage to Fixed

2 comments

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Comment by mesub
mesubMod 1 vote
Can reproduce CR: Canary Desktop 2026.528.23728, Web 2026.528.231208, Windows 11 10.0.26200 (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-GB
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