The calendar loads the principal's alias addresses so an alias-organised
event is recognised as the user's own. The fetch fired on mount, but after
a page load the JMAP client is restored asynchronously: the call failed
with "Not authenticated" in the console, and the once-only guard then
blocked the retry for the rest of the session, leaving the aliases empty.
Move the logic into useAccountPrincipalEmails, which waits for the client
and fetches once, and cover the sequence with a hook test.
dealerweb
bc5302568d