I’m really new to pellet grills but I’ve done 5-6 coats oks now on my 590 and this time the temp is making drastic swings in temp. I get an alert it’s overheating 50 or more then alert that it’s cooling down seconds later then back the other way. I am just leaving it alone but wonder why it’s suddenly doing this when it held perfect the last time I cooked the same thing. Driving me crazy. Thoughts/suggestions welcome for this Egg convert.