Also, unable to reproduce the issue? Both on Firefox freshly installed, and the desktop client.
Moving servers both in and out of folders works fine for me. I've tried with my newest account from a few days ago and one from a few months ago, both work.
@Dddsasul It might help to post any console errors/network logs from inspection tools that could give a clue to why yours might not be working.
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Comment by @HurleybirdJr