Hi Sjoerd,
If you add custom error handling to the commit that saves the password you can show a custom message instead of the default.
Here is an example that I just tested. I’m showing a custom message instead of the default. If you want the feedback, the latest error message token will have the feedback text as a string.
https://modelshare.mendix.com/models/83ac1d77-c9ff-4cee-aefd-22caedc979fd/change-password
Hope this helps!