That's the classic 'folding Ric'... the neck pickup route is way too big and takes a huge chunk out the neck/body wood; then string tension slowly folds the bass around the neck 'joint'.
Add in a bit of tail lift and you have what we see here.
It can be fixed by inserting a hard maple block to fill the pickup route, then re-routing a new, smaller, pickup size hole.
My 4003 started to go this way and I ran out of adjustment on the bridge saddle height - as the tailpiece was also showing some lift I replaced it with a Hipshot Ric bridge (a simple drop-in replacement).
This eliminated the tail lift and also allowed the saddles to go much lower, restoring a playable action.
Lighter gauge strings (40 - 100), as factory fitted, do help.