Sony Japan just issued a new firmware update for the A7rII and A7sII cameras. There is only one new feature: You can now record XAV-S on [shoplink 47270 ebay]SDHC cards[/shoplink] too (before that only [shoplink 47271 ebay]SDXC cards[/shoplink] were supported).
UPDATE: it’s now available at eusupport.sony.com.