I just notice that hundreds if not thousands of my old members have been moved from Inactive Members to Active members after the upgrade. (My setup move member to active members with more that 5 posts - but before they actually had to make a post before the membergroup was changed)

In 3.4.8 I used the Moved Inactive member app to move to inactive membergroup, but it seems like after the upgrade all members with more than 5 posts are moved to Active member without having posted or been at my site for several years.

Is 4x working in a different way than 3x as groups?

Could anyone tell me if there is different behavour in 3.4.8 compared to 4x? In 3.4.8 a member needed to make a post to move to the right group, but now it seems like they are moved without visiting my community in years. I might have missed something though..