Could be a coincidence …
- updated to v18.4
- updated to v4.3.7
- before both, have started using “Lockdown Mode”
- using Mastodon web client in (regularly updated) Firefox/iOS

… anyway …

In last 2-3 days am seeing not-logged-in page after leaving Firefox application. Then only after trying different URLs (with(out) “/home”) & reloading few times do I get the expected HOME.
😒

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