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My r6ii with rf-ef adapter and 70-200 f2.8 iii lens is now making a constant noise that sounds like it's struggling to find the focus. I've never heard it before.  I have bbf set.  Even with lens set to manual focus, the focus motor seems to be runni...
 for the life of me, I cannot find info about this yellow/brown icon which appears when I push focus (back button).  Any help would be appreciated.  R6ii, 70-200 2.8 on ef-rf adapter