I’m not really a Windows user, it’s a virtual machine with Windows 10 and MSYS just to build a GTK application. I recently upgraded the MSYS packages and all icons in the application are now of the symbolic variant.
The previous versions:
GTK: 3.24.13
PyGObject: 3.34.0
The updated versions:
GTK: 3.24.34
PyGObject: 3.42.1
Did something change in between? And if so, can I force back the coloured icons?