Every time I reopen GH, Value Set Picker resets and messes up upstream components (ElementType.ByName, etc.) Frankly, this is very annoying, I need to fix my definition every time.
I was testing it here and both the Filter and the selection are sticking through a save.
But it may matter what is upstream. What component is inputting into the picker? I am not sure what happens if the list is not available the first time it runs on open?
Also, there was a new installer a couple days ago, have you installed the newer version?