You should not have jeans on when doing mobility work.
The material of the jeans is not the best for doing this type of work and jeans can restrict movement.
Wear shorts or workout pants.
You may not be placing the band correctly.
Not seeing what you are doing can’t tell you what needs to be changed with the band placement.
As you work with your mobility and positioning is corrected you will have more space to move because you’ll be in correct positioning and not making compensations up/down stream of the problem area.
Full recovery, good nutrition, sleeping patterns all impact tissue/tendon health.