EDIT: @mindbleach@sh.itjust.works shared something that might help to circumvent this shit:
Contained in these parentheses is a zero-width joiner: ()
Basically, add those to whatever you feel that might be filtered out, then remove the parentheses. The content inside the parentheses is invisible, but it screws with regex rules.
Spent longer than I'd care to admit, searching that site for some other characters... before realizing it just printed the literal sequence of text you typed in.
lol ur welcome for the titillating experience