I'm running into the same problem on Resilio 2.7.2 on macOS 10.13.6. Sometimes when I move a folder into a folder that's shared with others using Resilio, I can watch the folder's date modified change from the correct time to an hour into the future, and then I start seeing errors and having files not sync.
For what it's worth, both of the computers that subscribe to this share are running macOS and are set to the Pacific Daylight Time time zone, and their clocks are synced to the same NTP server and are showing the same correct time.
I have watched the Date Modified value change an hour into the future as I move the folder into the folder that Resilio's syncing. I do not see this behavior when I move folders into any other folder.
I do have Resilio's Power User "ignore_mtime_assign_errors" setting set to "true" on both machines. I wonder if that has any relevance. I don't recall why I have that set to 'true', it may have been a workaround for some other issue I experienced long ago.