Tamron has released the firmware update V2 for 28-75mm f/2.8 Di III RXD lens (B&H Photo Video & Adorama & Focus Camera & Amazon). It seems that V2 firmware has solved the autofocus issue now. You can see these video reviews here.
Sony Alpha Mirrorless Cameras, Compact Cameras & Lenses Rumors
Tamron has released the firmware update V2 for 28-75mm f/2.8 Di III RXD lens (B&H Photo Video & Adorama & Focus Camera & Amazon). It seems that V2 firmware has solved the autofocus issue now. You can see these video reviews here.