For what it is worth, I notice that if I click on the Verified column heading, my views cycle through some of the suppliers. I'm not sure what it is doing but I can get my view to look like you are showing. Also, changing the width of the column is behaving similarly.
I don't understand what it is doing so maybe this is a bug?
Here is the link for the Altium Designer description of this feature.
This describes what it is intended to do. It does mention that you may need to enable the supplier extensions.
Uninstalling the Altium parts provider extension and then re-installing it seems to have fixed the problem.