I just found a slightly vague acknowledgement on the Ancestry UK Facebook site that it's not yet sorted, though no indication of timescales and no specific mention of FTM syncing:
"We expected the transition to be completed by the end of May, but because of the complexity of the infrastructure and the number of features we are working on at the same time, you might still experiencing some intermittent issues and glitches. If you notice an issue with the site, please report it here https://bit.ly/2xwWkzR along with your username and our developers will review the issues and prioritize them according to the number of users impacted. While we cannot guarantee a personal response to your feedback, we can guarantee we will review it carefully and will incorporate it into the resolution process."
"We expected the transition to be completed by the end of May, but because of the complexity of the infrastructure and the number of features we are working on at the same time, you might still experiencing some intermittent issues and glitches. If you notice an issue with the site, please report it here https://bit.ly/2xwWkzR along with your username and our developers will review the issues and prioritize them according to the number of users impacted. While we cannot guarantee a personal response to your feedback, we can guarantee we will review it carefully and will incorporate it into the resolution process."
