My barn manager stopped managing some of my horses, they are not level 10 and they still have a rider that is not retired, this has happened a couple times with one or two horses but today nearly 5 of my horses were no longer managed by her.

Do you have a link to the said horses?

To me everyone seems ok. Some have no riders as they are level 10 and these are the only unmanaged ones I can see?

I went back to the barn mangers page and managed them again, it happens occasionally, but I've never had 5 horses removed before

I'm having the same issue, except it's happening to all of my horses. This started on RO, and I can't figure out why it's happening. I've tried reassigning riders too, and non of my horses are at retirement level. I've never had this issue before, not sure why it's happening now. I've also talked to a friends who said she was having the same problem.