I'm looking at a filter I created a few years ago that gets used often in segments. The purpose of the filter is to exclude people who have been inactive for some length of time (a year, 3 months, etc.). I haven't looked at this since we migrated to E10, so I suspect what I'm seeing is a result of this.
There is now a criterion in the filter called "_Segments Criterion Name VisitedWebsiteCriterion Inactive". There isn't a criterion with that name in the selection list at the right. The criterion description says "_Criterion Grammar VisitedWebsiteCriterion Inactive". I'm guessing, but would like confirmation, that this is the same as "Not Visited Website" but it was somehow renamed during the transition from E9 to E10.
Deanna, Helena, Evgeniya, Selena I saw this in one or more of your inactivity filters, too. I think these are working correctly, but would just like to be sure. I may update my filters with "Not Visited Website" just to be sure.