Wine 5.0 not full screen puts scroll bars after focus loss.

I have a few Windows apps that I use all the time (they work better than the Linux replacements - mostly Ultraviewer from 2014 which displays perfectly).

In 15.1 there were no issues but in 15.2 any wine program not full screen will have scroll bars on the side and bottom when I switch to another window and come back.

I am using MATE desktop and lightDM.

If I make the wine program window about 2 scrollbars bigger - no scroll bars but a black boarder.

Anyone else seeing this.

Do I need to created a bugzilla.

Is there a cure?