Can't connect to Minecraft Realms, but can connect to multiplayer servers

This bug makes it so that I cannot stay connected to the Minecraft Realm for more than 20 seconds. I can connect normally and without fail to regular multiplayer servers, and other people on my internet are able to connect to the same Realm without issue.

The code given is Connection Lost: Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host