Group block screen refreshing by itself when click on different open tab

I am using the group sales screen and have it filtered by one group. Everytime I leave the group sales screen to look at another screen (availability for example) when I click back to group sales my filter is no longer in place. It is physically typed there, but the list is no longer filtered. To be clear I am not closing out the group screen, just clicking off it to another screen and then clicking back. I am not closing out the sales screen.