Invincibility bug

We took this video with my friends phone to have some proof of what happened because the enemy team said I was being reported for exploiting whne I had no control over anything. Its poorly shot and has bad camera quality but its better then nothing.

What happened?: When playing In the jungle I seemed to dc but my friends said I was still moving randomly. Eventually my character moved into mid lane and we discovered that I was invincible, but I could not control my character at all. My champion then got stuck at the second mid tower where it blocked off the minions and tanked the tower. And later in the game My champion ended up in their base blocking off minions to top and bot. During this time I could type and they could read my responses but I could not see theirs, My screen was stuck were I thought I dc.