Overheal working with Morgana's passive?
I went in a training mode and tested the Overheal rune with Morgana and it doesn't seem to really work unless you check the "Auto-Refresh HP" option. My testing method is pretty simple: I take out a wave with my abilities and take a turret shot to see how much it blocks (since I can see I have a shield but can't see exactly how much shield value I have at the time). When I do it normal it blocks around 1/10 of what it should be blocking. When I auto-refresh HP it blocks the proper amount.
Sometimes after building my shield it will only block 5 or 6 damage, which makes no sense considering the minimum should be 10. If I have 700 HP the shield should be 80 HP strong when maxed out, but it's only that strong if Auto-Refresh HP is selected...
And no, I'm not taking minion damage or any damage from any source until I take intentional turret shots.