Enter a tag that starts with a number (e.g. #1stPhase)
Press enter or space
Check tags sidebar (Bug: the tag does not appear)
Attempt to reference tag in another note (Bug: the tag can not be referenced in another note)
*Works when the tag does not start with a number (e.g. #Phase1)
Moreover #1987/ works and creates the tag #1987 and the empty subtag.
It should be definitely considered a bug, I am using numerical tags for dates and it works great e.g. #2022/02/28