still haven't figured out the top bar being empty in most cases tho..
Do you happen to have set your listing type to local in the preferences? (“show posts from [local] communities by default”)
I was made aware of an issue with that today – basically, non-local communities are filtered out from the list when that is set, but the list only includes the top twenty communities in the first place, so it just ends up empty. Version 26.3.3 should fix this :)