Cubase 9.5 Loosing Mouse Focus

Ive had an issue which has plagued me since version 9. After say half an hour the mouse looses contact with the Cubase menus and buttons, what ever button I press does not press. I have to minimize out of Cubase and go into another application then go back to Cubase to regain mouse activity, then sometimes Cubase crashes out. What on earth is going on? Does anyone else have this issue?

Is there anything that coincides with you losing mouse focus? I’m just asking because losing mouse focus (and then the crash) has never happened to me. could it be an issue with your mouse/its software?