[Bug 46434] New: GUI components not showing when usnig the GTK-3 theme.

https://bugs.winehq.org/show_bug.cgi?id=46434

Bug ID: 46434
           Summary: GUI components not showing when usnig the GTK-3 theme.
           Product: Wine
           Version: 4.0-rc5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 63208
  --> https://bugs.winehq.org/attachment.cgi?id=63208
Only the top buttons are rendered because I clicked them.

Hi there,

This is my first bug-report so go easy on me.
I'm running wine-staging rc5 on Fedora 29 x86-64.
The build was installed from the official repository:
https://dl.winehq.org/wine-builds/fedora/29

Now by default in winecfg -> staging tab there is a box that says:
"Enable GTK3 Theming"
It's checked by default.

However this causes the gui elements (buttons, input fields etc) in BMC Remedy
User to not being visible unless I highlight them.
e.g. for buttons I need to click and keep it them pressed, then move the cursor
away from them and release the button, so I don't click them right away.
Then they show up.
This is a bit of a pain, when there's forms with multiple buttons, textfields
etc..

When I disable GTK3 theming they do show up properly.
See the attachment, I highlighted the top three buttons for them to show up.
The others are not rendered by default.