So I think I found an issue with this incubator:
https://a.co/d/cXV4vlH
I watched the tray on this incubator for a few hours now and something doesn't seem right. Every two hours it will shift from the far right to the far left, then immediately back to the far right. It looks to me like the eggs aren't getting fully rotated. They're also being moved back into their original position after being tilted 1/4 - 1/2 turn for a few seconds.
I'm attaching a video in case my description of the issue isn't clear:
Should the eggs be rotated 360 degrees, or is slight tilting sufficient to prevent the embryo from adhering to the shell/membrane?