How to investigatie the busy cursor issue on browser?

I am developing a web app, do not know from when, once I move the mouse into a dom element, browser show busy cursor until the mouse move out then cursor becomes normal. No mouse move or hover event listener registered. I also cannot see only dom change during the mouse move, from the preference tab of chrome developing tool I also cannot find obviously performance slows down. It happens on both chrome and firefox, windows 7 and windows 10.