Breaks my user-css-style for twitter. Rolled back to 4.19.0 before witnessing more unwanted issues.
Took me a while before realizing tampermonkey 5.00 was the culprit. Yeah, a while :/

edit 2:
Beta 5.0.6191 had the same issue. (but totally breaks youtube's feed page no matter what)

Settings I ventured in then, and found out that -Modify existing content security policy (CSP) headers = no- instead of -Modify existing content security policy (CSP) headers = yes- fixed my issue 👍