What kind of hardware are you running on?
I had some really weird behavior recently (like a week before this post; in my case, the external display would disconnect), but it got fixed with an update. I've also had weird freezing/crashing issues ever since getting my 1st gen Ryzen (bought at launch; probably a HW issue that I never bothered to RMA), and it can be stable for weeks or months or crash multiple times in a day.
If you can post the HW you have, maybe someone has a similar issue.