[Boot2Qt] A windows is blacked out in QQuickWidget Example application

Host: Windows 11
Qt Creator: Qt Creator 12.0.1
Target: Toradex Apalis iMX6

Steps to reproduce:
  Run Qt QQuickWidget Example (quickwidget) on Toradex Apalis iMX6

Expected:
  A rotating red rectangle is displayed in the right window.

Actual:
  The right window is blacked out and it does not show anything.
  (See attached quickwidget_6_5_5.jpg)

Reproducibility:
  100% 

Supplementaly information:
  The red rectangle shows up by setting the following environmental variable: 
    qputenv("QMLSCENE_DEVICE", "softwarecontext");