Since the upgrade to 15.5.5, I've been having a weird issue, where if I use full screen for any guest, both Windows 10 and Ubuntu, and I go fullscreen, then move the mouse so that the VMware bar at the top comes down, the whole screen goes black for 3s. If I move the mouse back down and the top bar goes away, then I get 3s black again. It's like the call to the VMware interface causes some pause in the graphics driver.
Since it seems to be both OS, it seems like a nvidia driver issue.
Turning off 3d acceleration fixes the issue, but I miss the smoothness of the interface on the guests without this.