Okay hello everyone!

My issue is that when I like play on Multiplayer and stuff for maybe 1 hour and sometimes just 30 minutes. My game crashes and this is what happens: Playing 1hr Multiplayer > Everything freezes for like 5 seconds > My screens turn black and it says no signal 3 - 5 seconds> All screens turn back on and Minecraft is invisible and I can't do anything on my Main screen if I don't press Windows Button and then open Task manager and Stop activity. And this issue is Really annoying when lets say building or flying with Elytra and then Minecraft crashes and I don't know if I die or something and this goes on and on.

Thanks for all answears.