My Minecraft Realm Freezing

When I join my Minecraft realm, it works for a solid minute. But when I open a chest or crafting table, it freezes. I click the Windows button on my keyboard to get out of it. I try and click the Minecraft icon at the bottom, nothing. I double click. Nothing. Is anyone else experiencing this?

Also, I downloaded the realm into a regular game of Minecraft, turned on coordinates, and then uploaded it into the realm.