[GAMEPLAY] Practice tool Rammus beginner bug

This happened to me while trying some new champs in practice tool and I randomly got rammus once. I played with towers invincible selected and often skip 30 secs until I noticed rammus destroyed one of the towers (bot one). I started looking closer and indeed he can deal damage to invincible towers.

To replicate

1. practice tool
2. select rammus bot beginner
3. select invincible towers then skip 30 secs until you'll see your towers destroyed