As far as I know, Priority Assignment reset occuers every 24h after completing the last assignment. Could you please check if there is an issue with it? I observed a strange behaviour regarding this. I did the last assigment on Monday around 4 pm. Next day (Tuesday), my available assignment count was still 0 at 8 pm, more than 24 hours later. On Wednesday at 8pm, I had 1 assigment. I did it, and immediately after, I got 1 available assignment again. I thought this to be a coincidence. However, this (getting one assigment immediately after completing one) happened 2 more times after this, so it is not a coincidence. It seems the number of available assignments get "stuck" somehow, and sometimes a new assignment wont be available unless you complete the previous one, so assignments dont stack up till 3 for some reason.