[ubuntu] VM freezes occasionally on running OpenShop

Hi all

Host - Ubuntu 18.04 gnome desktop
VirtualBox 6.0
VM - Ubuntu 18.04 gnome desktop
OpenShot - version 2.4.4

On running OpenShop to edit video VM freezes occasionally. I have to reboot VM.

Please advise how to fix the problem and where to check.

Thanks in advance

Regards
satimis