int0x80 
Check your Twitter DM settings. Mine were modified involuntarily.
Settings > Privacy and safe > Direct Messages
Ryan Castellucci (they/them) 
@int0x80 Mine was changed to "verified users only" and the quality filter was disabled.
@ryanc reports have wildly inconsistent behavior. Some accounts have not changed, while others change multiple times daily. Imagine being an engineer in the present day trying to make sense of the current state of Twitter systems ☠️