Your body make compensations that you may or may not be aware of up/downstream of the restriction.
This is a contributing factor. Your shoulder probably isn’t in the best position which is causing the issue.
Missing alot of external rotation is another impacting factor.
Episode 261: Perfect Pushup ER Lie Detector
Episode 195: Let’s Change the Way We Think About the Shoulder, Eh?
Episdoe 178: Flexion + External Rotation Analogs
Episode 80: Best Shoulder Mob Ever