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.
J̷͚̦͙̦̅̊̾̓͂̋̋͊̆́͐͑͜O̸̧̨̱̰͚͍̼̺̰͇͎̜̺̥͋͊́Ĭ̸̢̥͖̲̗̉͊̈́̐ͅN̷̛̤̙̖̗̰̲̪̰̰͓̪̒̊̂̑̑͌͑̒̄̀̆̇͒͌͐̚ ̸̡̨̲̣̳̪̮͈̩̭̙͈̗̭͖̃̏̽̄͆͌̂̀́͒̚͜L̸͇͇̬̜͈͔̩̣̲̩̳͉̥̳̈̒̉̑̅͑̀͊̓̍́͌̊̓̕͝Ẻ̷̡̟͔̖̯͕̩͎̺̮̙̜̭̬͈̦͊͆͜M̸̜̲̱͍̱̪̗̘̯̗̳̯̥͂̆̈̄̉͋͂M̸̡̤͈̝̺͖͉̺̓̍̄̂̾̍̓̆͆̑̀̏͐̕͝Y̶̢̜̱̘̟̩̠͊͂̀̿