In my realm with a couple of others we have noticed a couple of issues over the last couple of weeks in which are unusual. For example, we have been experiencing a lot of lag and entities/ mobs have been disappearing. Mobs being: named horses, breaded animals or leashed animals. In addition to this, the system, on several occasions, has prevented us from even entering the realm, claiming that the owner of the realm has not updated their gameplay, which we have found to be false. However, this issue has often fixed itself but still occurs frequently.