Linux: UI component focus lost issue

[asb2m10]

With Linux (Wayland and X11) DAWs, JUCE components loses focus for no reasons (confirmed with 0.3.1 and current develop).

[asb2m10]

I confirm this is a JUCE issue, the Standalone doesn't have this problem, only when the plugin is hosted in a DAW.

The problem is very similar to this one (identical) : https://forum.juce.com/t/texteditor-loses-focus-on-linux/66195

It mainly occurs when I add a TreeView component to the window. I should write a sample application to illustrate the problem.

For now the use the keyboard to switch to focus components.

[asb2m10]

Same issue over here with SonoBus: sonosaurus/sonobus#197