Not sure if this is really bug, but I like that Obsidian remembers whether the collapse feature for the nested tags (in the tags pane, from v0.10.3). I think one improvement that can be done is for Obsidian to remember the collapse status after closing and opening the app, because on closing the app it resets.
it rememers it already
ok, my bad. I didn’t get what you mean.
Please, open a feature request.