User Activity

I have 2 18-80 cinema lenses that suddenly stopped communicating with a 1DX Mark II. No AF servo or anything else. All my other lenses work just fine.  Suggestions? 
I have an 18-80 cinema lens and suddenly the AF servo stopped working as well as communication between the lens and a 1DX Mark II.  I have a backup 18-80 and this one is also doing the same thing. Suggestions?