We have received complaints from our customers that HOFA plugins (VST3) do not correctly work when used with Cubase 10 on macOS.
The problem is that the GUI is not completely visible (partially just back) and usable anymore as soon as a VST3 plugin window has been resized. Everything worked fine in Cubase 9 and older versions.
The problem is reproducable with resizable plugins of some other manufacturers as well! So maybe Steinberg can have a look at this issue and give a statement if they are going to fix this in Cubase.
We will also investigate if this can be fixed somehow on plugin side.