Heal Bug and Grass Bug
The summoner spell "Heal" is double healing the caster. Apparently, the heal that targets an allied champion is being applied to the caster when no ally is nearby. Which it should not do according to the tooltip. In the bottom lane of the upper grass section. You can go above it a good unit or so and you will still be hidden but you will not be in the grass.
I don't have replay and cannot get my screenshot to work, so sorry for the lack of hard evidence. However, these bugs are not hard to recreate. So if someone who has a working replay can provide the evidence to get these fixed, it will be appreciated.