Avast One free - smart scan stalls during advanced

Hi, I have Avast One (free version) for windows. Ive noticed recently when I do a smart scan, all is fine until it gets to the advanced bit, and then it freezes at 83%. Been going on for a few weeks now. Perhaps it’s not an issue, but odd that when I first installed it it worked fine, then after a couple weeks use this started to happen during every scan.