[Gameplay]
Often times (especially late game but other times too) when i go back to the Fountain to heal, if i'm healing up and shopping while i heal up, and then i use the "undo" button in shop because i made a mistake in my purchases, the health i have restored thus far while shopping is undone as well as the item purchase.
So TL;DR, when you use the undo button in the shop, it undoes your fountain healing as well. This happens frequently enough and with enough champions i feel like it should be easy to recreate but have never tried to make it happen on purpose.
Thanks for any help with this.