Strange behavior with tag browser

What is that?

With Ignition 8.0.12, when I browse in my tags, I can see values when I expand a folder of a UDT.

But when the window need to be refresh (example scroll up of down), I have questionb mark:

Same here, with version 8.1.9.
My tag value is displayed as “?” icon, but my tag quality is indicating as good…
I am wondering if it is due to data type mismatch or something? :thinking: