Visual residues and artifacts when remoting Qt5 based applications
Description
Tested on Ubuntu 20.04.1 LTS Server, weston installed from apt source.
When remoing Qt5 based apps, severe artifacts can be observed.
Reproduce
Grab a Qt5 app, for example, qbittorrent
Remote with waypipe with default settings.
If you try to switch tabs, something like this happens
If you hover the pointer around, it becomes this...
It is not limited to tabs, there are always some visual residues following you
Notes
Both server and client are headless, no gpu is installed.
Setting -c none won't affect the result.
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