When you say the windows turns white - is this happening “after a couple of hours”, or after you have minimised and then restored the Window?
I suspect that you have Intel HD Graphics hardware on your PC, and that what you are seeing is this issue:
https://community.roonlabs.com/t/roon-becomes-unresponsive-ghosted-out-completely/13683/10
A workaround for your PC would be to install the 32bit version of Roon. That does not seem to suffer from this driver issue.