Getting refresh command automatically during selection

Hi guys. Here I have an issue regarding modeling in SketchUp 2020.
Example. during selection an object cursor goes automatically refresh (undo).
mean cursor goes refresh after few seconds continuously. then I have to again request for command in very short time. this issue I’m facing just in this model. in same time if i do work in other SketchUp with an other simple model there I don’t have this issue. Please Help. Thank you.