GAMEPLAY: Tahm spitting out immortal Heimer turret

Hi I just wanted to report something odd that occurred while playing support Tahm Kench vs. a Support Heimer in my Latin America North account. Simply put there where moments where, while trying to spit a turret as far from my carry as possible, it would stop half way from its usual spitting trajectory and be unable to be destroyed even when brought down to 1 health for a few seconds. If it's any help even relic shield seemed to have no effect. Later the glitch seemed to dissipate but it caused some confusion early game. Oh! Also there were moments where instead of being spit out it would just phase out of me in place like a champion