I wonder why it takes so long for Canon to fix your camera? I thought that C-log is just a software update that could be loaded by Canon in matter of minutes. Are you claiming this issue to Canon Belgium or to your camera shop where you bought the 5D...
I can only confirm that I had exactly the same issues with AF and my newly purchased 6D mark II.The lenses I used with this body: Tamron 70-200mm f/2.8 SP Di VC USDCanon EF 50mm f/1.4Canon EF 24mm f/1.4 LCanon EF 35mm f/2 IS USMAF was almost always o...