Need to identify where the pain originates.
What have you been doing to address it?
Seeing any changes?

How are your squat mechanics?
Are you working both sides of the joint?
You are addressing the joint capsule with the band, however, are you making change in the joint capsule?
Poor trunk control can cause downstream tightness.
When disorganized at the trunk and loading the calf, quad, & hamstring may get tight to protect the nervous system.
Wonky, Beat Up Joint? Feed That Thing Good Mechanics and Some Slack