Need advice on small visual glitch

I’ve made a book with flip-able-widget-pages and it’s working fine except for small visual glitch when I swap the page from one side to other and small blurriness. Sort of like mesh in new position has to sink in for few frames. Motion blur is off. It doesn’t occur when I switch to unlit mode. It’s not super visible on the video but that’s the best quality I’ve managed to record.
Can I do something about it?

Idk but try increase the light map resolution to 128 or something?

Nope, still the same. I suspect this has something to do with one mesh being static (book cover and non moving paper parts) and flippy page being skeletal mesh.

Was my fault, not Unreal’s. Like usual :wink:
Fixed with AutoSmooth in blender.