You can turn off member tree hints - it's a new feature. I never used them because I never attach other people's trees as a source so I have the hints turned off. You can still view tree matches by using the "member connect" tab - I sometimes do this to get a lead or find records I might have missed. But I never actually attach another tree so I was constantly "ignoring" the hints that would pop up for them and now finally, I can turn them off!