The fact that you touched the bare aluminum body of the Oasis 3 when it jumped ahead many pages/chapters makes me wonder if Amazon has a grounding issue with them. Perhaps a faulty design or a disconnected ground somewhere. That is just one of many possible causes though. I had a Kindle a few years back that jumped ahead a lot, but I can’t remember which model it was or if it even had a touch screen.
Yesterday, or the day before, I was reading on my Oasis and I came across some photos that were embedded in the text of the book. Kindles often page break strangely around embedded images. I was about 15% through with the book. After I hit the page button to turn the page forward on the final embedded image I got that end of book page thanking me for reading the book and suggesting some similar books. I thought "bleep" the darn thing just jumped to the end of the book. However when I pressed the page button again I went to where I was supposed to be in the book. Odd thing to happen. I guess the firmware is a bit flaky, which is SOP with Amazon devices.
I’m pretty sure the whole not seeing cloud collections issue is a firmware quirk too. No excuse I read yesterday makes any sense, to be honest. The worst excuse I read (multiple times) is that the Oasis has to index the cloud collections. Seriously, it has to index what is on the cloud before it can even see it? I’m pretty sure that is pure bovine scatterings. It shouldn't need to do that. I understand indexing downloaded books, but not the Amazon cloud. Other devices could see all the cloud collections and changes immediately, but the Oasis is still not seeing them 24 hours later. My Kindle Basic 10th gen is also having issues seeing the cloud collections, although it does better than the Oasis. So there must be some wonky firmware code inside of them.