For me it does not happen. So this is related to a specific configuration or a incompatibility with a certain program/library.
All you need to find is the thing that your configurations have in common.
It may be a certain program that is running, a certain version of comdlg32.dll, etc.
You said this happens with no plugins loaded.
Please run in safe mode with only windows services running, no drivers or other 3rd party programs or plugins. See if this happens again.
I can tell you IrfanView uses no MFC. It uses plain winapi.
All you need to find is the thing that your configurations have in common.
It may be a certain program that is running, a certain version of comdlg32.dll, etc.
You said this happens with no plugins loaded.
Please run in safe mode with only windows services running, no drivers or other 3rd party programs or plugins. See if this happens again.
As the Open dialog is either an original (Irfan) dialog or a modified version of the MFC class, I wonder if the problem could be there. In this case, it is a bug in my mind.
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