I had this going on pretty bad late summer...I don't really know why it came on, but I had not been shooting my bow regularly as in years past.
I shoot a caliper (trigger) release. I mostly cured problem by folding my finger back and forcing myself to hold the pin directly where I needed to hit. It was incredibly difficult to remind my brain that it needed to let the pin linger right on the spot. I went through several sessions where I only shot two arrows, but I drew back 15-20 times. Once I started to come around, I started shooting many arrows a day in different shooting sessions to make sure that my form was back in shape...
I know that this is not a short-term solution and that is probably what you're looking for due to the season being over tomorrow, but hopefully it can help your problem.