[ubuntu] problem re mouse pointer invisible

Hi all,

Host Ubuntu 16.04 64bit
VM android-x86_64-6.0-r2
Oracle VirtualBox

This is frustrating me. The mouse pointer is invisible after the mouse working a while on the host.

The indicator is on showing the host mouse pointer is captured by the guest. But the mouse pointer is invisible on the guest. I have to reboot the guest to get it back.

Please advise how to fix this problem.

Thanks in advance

Regards
satimis