Same, last night I ate almost at maintenance after like 4 months in a deep deficit and it felt like I'd taken clenbuterol: sweaty, shaky hands, elevated heart rate, pink cheeks

It's literally your metabolism functioning normally for the first time in a long while--ppl who eat enough in general don't usually experience sudden upsurges like that

I'm probably going to deliberately eat at maintenance once every week or two going forward and treat it like a necessary thing to maintain my metabolism and digestion and whatnot

P.S. you will likely either wake up a few pounds heavier than usual, which is water weight and will only last a day or two, OR an astonishing number of pounds lighter than you expect