Regression. Application crash with 5.11.0 - that doesn't crash in earlier versions

The last thing I hear from the application is:

file:///home/user/Environments/Qt/5.11.0/gcc_64/qml/QtQuick/Controls/Styles/Base/SliderStyle.qml:208:13: QML Loader: Binding loop detected for property "y"

file:///home/user/Environments/Qt/5.11.0/gcc_64/qml/QtQuick/Controls/ApplicationWindow.qml:240:9: QML ContentItem: Binding loop detected for property "implicitWidth"

The program has unexpectedly finished.

The process was ended forcefully.

Running in debug mode I can get the attached stack trace.

As usual I can't get you a minimum example as this is in the middle of a huge codebase for an adventure game I'm working on. But hopefully it can still be of some help.

The game compiles and run with at least 5.9.5 and 5.10.1 in the same environment (I also get the same "Binding loop detected..." warnings - but they don't crash the game)