Please note: this affects ALL PC versions of Minecraft Windows 10 Edition.

This bug causes the game to automatically cut all online connectivity (kicks you from realms, servers, etc) if you minimize the game in any way (minimize button, Alt+Tabbing out, etc). This is SUPER annoying in servers, and it affects Windows 10 Edition in its entirety. It doesn't change depending on OS version, specs, or anything else. It's a problem within the game. You can recreate this bug by opening the game, going to a server or realm, and minimizing Minecraft. This only happens if the game minimizes. It doesn't happen say if you have 2 monitors and click something on the second monitor, only if the game minimizes.