[Gameplay] Undo Bug

Undoing any item which was bought while recovering health/mana undoes them for the same time which was spent upon while buying the item.(ex.) lets say your current health is 500 from 1000 max health and while you are recovering health from spawn base and u buy an item while at 700 health (recovered from 500 by time spent) and then u decide to undo it for whatever reason when you are at 900 health (recovered) it reverts back to 700 like it undoes the entire recovery process from when the item was bought (same issue for mana).Please fix this as it definitely doesn't seem like an intended issue and has only been around for a while from a few patches back.