Hi I can confirm the above! I tested the issue after @nagaconnie mentioned it making my own community and I'm completely unable to arrange any channels.
I also refreshed the desktop app and tried again and still had the same issue.
stable build 84 (356bd53), 2026-03-06 03:57:38 UTC, Electron 39.2.7, Windows 10 10.0.19045 (x64), desktop stable 0.0.8
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Comment by @DarkOverord