Or...if I might share my personal experience, it could be simple body issues.
Quite a number of years ago, I was shooting pretty regularly in the yard and no problems.
One day, I come to anchor and scream like a girl! It felt like someone hit my draw hand with a cattle prod!
My arrow was gone but it hit the target.
I ran in the house and iced my hand for 30 min...went to 3 docs and was put through all sorts of tests, Xrays, etc. EMG's, all to no avail...
Finally, I got to see a real hand surgeon--he smiled. They call it "trigger finger". Just happens. There are tendons run up the finger and go thru things he said look like a fishing rod guide...when those "guides" get inflammed, then tendon won't slide and you can tear the li'l hangers that hold them to the bone.
Long, arduous surgery follows and long rehab. Luckily, I'd not torn the hangers loose.
He shot me full of corteson, stratigically placed, and I shot bow 2 under without the ring finger for 2 yrs!
One day, I decided to try a modified split again and the finger was fine. That was oh... 6-7 yrs ago and not a recurrance.
I shot the same glove I shoot now (super glove from ABS) and the surgeon said there is no explanation...just happens! FWIW.