Display glitch when folding code in Text editor the first time

Hi,

After installing Qt Creator 13.0.0-beta1 (12.0.82) install, I have a recurring glitch at start up.

I have a shortcut set to UnfoldAll / Toggle Fold All code in the Text Editor.

The key sequence is:  Ctrl+Alt+<

Usually, I just start in the application, open a code file and I tend to fold code right away to navigate in the page. For taht I simply do the key sequence when the file opens.

Since I installed Qt Creator 13.0.0-beta1 (12.0.82), on the very first occasion only, when I press the key sequence the code briefly folds for 1 or 2 seconds, and then automatically unfolds. I need to press the sequence twice to finally fold the code.

This behavior happens only once after the start of Qt Creator, and then is not repeated until I close Qt Creator and start again.

Thank you