YouTube bug Bypass Banned words.

 

In the Settings of YT Studio. 

The Community tab has Advanced Filters tab, that lets you enter the "Blocked Words". 

For example if you enter the word "Hello" and save.

Enter the Hello in different styles like "HElLo", and it gets Held for Review.

But if you append an emoji it could bypass the filter at the server  and goes for review and gets displayed in the the comment section.