Switching Instances via fullscreen account switcher briefly shows "This is not the community you're looking for" error during switch

When another account is clicked in the fullscreen account switcher [this notably does not occur when using the popover quick switcher], during the process of loading into the other instance, an error screen appears for a fraction of a second. "This is not the community you're looking for"

Canary Desktop 2026.1008.32323, Web 2026.1008.32323, Windows 11 10.0.22621 (x64), Electron 44.4.1, Chrome 152.0.7977.78, Node 24.21.0, Locale en-US