After pushing you need to reset cleanly - if you overstay you die and throw, and you want to get back out on the map fast enough that they don't have a window of time after respawning to take anything while you're basing/in base. So after for instance taking mid inhib, yung fappy will use teemo's passive to sit mid instead of resetting like you'd expect. Then when a squishy adc/support walks by, auto ignite idk they seem to die pretty quickly.

It is a bit unexpected if you don't play vs teemo often since normally after the enemy team pushes it's your turn and you can walk out of base without fighting anyone.