Samyang is continuing their serious play on the field of AF lenses for Sony FE and released firmware updates for 2 models this week.
Continue here to the firmware page at Samyang.
Unfortunately there is currently no further descripton about the improvements available.
AF 14mm F2.8 FE Ver.21
AF 50mm F1.4 FE Ver.32
To update the firmware it is necessary to use the Samyang Lens Station (similar to Sigma Global Vision lenses).