May want to have someone look at your squat mechanics.
You may be doing something slightly different from restrictions you may not be aware are happening.
Have you hit any hip openers?
A couple  to start with
Episode 206: The Couch Series
Episode 235: Recover Your Anterior With the Super Couch
Episode 271: Full Over Head Test and Super Couch
Pro Episode # 52 – Pro user Request Friday: Couch Stretch Feel Weird? It’s a Diagnostic Tool too.