Try adjusting your trigger pull back up a 1/4 or 1/2 turn to see if that resolves the issue. If you go too low on the accutrigger it will trip the safety feature of the design will trip.
If that doesn't fix it then I'd try scraping off the paint anywhere around where the bolt release mechanism is as the thickness may be enough to prevent the button from extending back out all the way. Haven't played around much with the bottom bolt release system so hopefully someone with more hands-on with it will chime in.
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