Warning: Reddit is shadowbanning people for talking about Lemmy. Picture related.

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.