Western Airguns Rattler trigger problem

So looks like one of my Rattlers developed a trigger problem - wondering if anyone else has had this happen or can diagnose?

It's got around 10k rounds through it so this is the first problem with this one - but the trigger doesn't reset after you pull the trigger and fire.

It takes a little more force to reset it - as in if I pull the trigger and release it normally, it will not reset.

If I pull the trigger and slide my finger off the trigger and let the trigger fling back into position, that amount of inertia resets the trigger.

So I'm guessing something in there is getting sluggish or hung up or something? Not a big tinkerer so don't wanna go poling around this thing before I know