encountered strange exploit today right after maintenance

everytime i clean pies of my card i get stamina restored to full

gets worse after i clean them i can just reset the page and they are still there

that means i can keep going ... now i only did it twice so far i was curious what caused it
(and i wanted to see if im missing any girl from todays GHQ )

edit : it gets worse when i was writing this massage i got stamina restored to full for no reason

from my experience from games like warcraft i know that those that use exploits get punished
(yea i found a bug in ur game = banned)

did anyone else encountered this so far ? is it being reported ? can i expect a ban for using this exploit ?