Flipping pages right now is very annoying. Slow and with the weird redrawing flashing. If they can find a way to fix that it'll be 100% worth it, even if it means high power draw on page changes.
Kobo devices do a full page refresh periodically, which is probably what you're seeing. iirc it will do it on chapter transitions to make it less jarring.
Basically, it's intentional and relatively rare (unless you have really really short chapters).
and a colour Boox. The refresh on the Boox is so fast, you can watch video.
I don't think the Meebook has refresh issues, it's definitely very fast for back/forward. Of course I don't have page turn animations on. I use the kindle app on it, and KOreader. If you get this, know that there is a thread to drop in a script, so the volume buttons page turn correctly when upside down.
If you live in Amazon turf, you can always buy and return if not suitable?