Spark and Openfire locking up when game are run

Hi all. I’ve actually recently begun playing with Spark in a home networking for both testing reasons and so I don’t have people coming to my room to bother me, they can do it over Spark in home network environment. An Issue I have though (I am not the brightest person out there!) is when anyone is playing a game and gets out of it, Spark has frozen and must be restarted. For me, It’s spark and openfire since currently I just run openfire on my main pc.

I’m curious why this is exactly, and if there is anyway around ti would be glad to know that also. Thanks!