Edit history: Cross-instance message links appear as "No Access"

Observed behaviour

When in a self hosted instance, a friend wanted to send a message link from the main themes instance - but instead I see "No Access" as the link. image If you click on it, a modal pops up saying channel access denied. image But if I right click the "no access" hyperlink, I can see open link and it opens to the themes message I linked (in a new tab on the Fluxer instance). image

Reproduction steps

Copy message link from official instance
Paste link in self-hosted instance

Build information

Stable Web 2026.829.222546, Windows NT 10.0 (x64), Firefox 154.0, Locale en-US

Platform

Self-hosting