I was using it on the v1.8.0 Techart firmware, and the v1.0 A7V firmware. I had to return the Techart before the v1.0.1 firmware came out, before the amazon return window closed. I assume that it's just part of the general "lots of third party lenses are having issues with the A7V" issue. Whether it's fixable on the camera's side, or will require Techart to update, will have to wait and see. I'd also want to hear that someone was having 95-100% success (obviously any AF can miss a shot here or there), for a full session, before trying it out again.
That said, the Sigma 24-70 f2.8 II is a dream, and frankly I probably just don't need to put anything else onto the Sony.
honestly I've never got 95-100% with LM-EA9 and adapted lenses. I uses that with my A7IV to shoot my fast moving cats in AF-C mode close-up though, it's good enough for me. I will test that on A7V more once I have a chance. Initial impression it's similar to A7IV
