Cannot create tags

I am unable to create tags, # or @, on web (Chrome) or iOS mobile. Typing #abc only creates the text. Is there a setting I’m missing? New here from Workflowy and TickTick so help appreciated. Thanks!

OK, after some delay the alphabetic tags are being created but numeric tags are not; ie:#123

Number tags are not a thing.

OK, that’s less than intuitive but, OK. Thanks for the help.

Blame twitter, or whoever invented them. Hashtags have never supported only numbers - doesn’t work on twitter, instagram, anywhere. So it follows suit. Probably because most instances of #1 #2 in text are not intended as tags but as abbreviations of the word number.