canon 80d and a loose lens mount

[gary anderson]

My focus stops once in a while when mounted with sigma 150-600 sigma..a bit of play at mount i believe is causing it. Contacts are clean, lens is new and had been doing good until recently and other lenses don't seem to be as loose. Anyone else have this.

 

[SuzukiGS750EZ]

My tamron and uncles Sigma, same as yours can be slightly rotated. Wobbly if you will, in the mounting direction (around). Up and down should be none at all.