Most of my problems come from manual work so adjustments in my job were also required in this journey.
I have to admit that I carried on playing the short scale bass for several years after my symptoms subsided which took about 6 months from memory. Even now I can only play certain fullscale basses without having issues, strap height and how the bass hangs seem critical to me.
Whilst this may seem weird, throughout the day and when going to sleep I try to always keep my fingers straight as much as I can instead of having them curled, not sure if this helps but it seems that as you get older you can have problems straightened your fingers so in my mind this should help?