I have been tediously going through syncing a tree with Ancestry. From time to time I will encounter a person who is duplicated in RM8 so I back out, merge the people, then return to Syncing. At that time I get a long message about how I am not longer connected to Ancestry.
The only solution seems to be to close the file and start over. When I do that, I am asked to sign in to Ancestry again, even though I have checked the box to sign in automatically and not go through the sign in process again.