Hi,
When selecting a tag it filters the notes that have it, however if I move to another notebook, and select again a tag, nothing happens, no error on the console. I attached the console output anyway because it does has a lot of warnings.
Also Help->Open profile directory does nothing. I had to find the folder in .config/Joplin manually.
On v1.4 there are a few fixes regarding tag selection and sidebar interaction in general so it might be fixed. If it still happens on 1.4 please let me know, and maybe a video showing the problem would help.