Violent crashes after a few minutes of gameplay since new update

Been trying to play for the last 2 days and me and my friend have been suffering very violent crashes since the last update. We both cannot play as a result of this.

Also there is an immediate crash when entering the nether.

Source Information (watch from 7 minutes): https://mixer.com/dannydaman9?vod=7631402
This crash completely froze my whole pc. I do have a previous stream available but it is 2 hours long which also records my friend who suffered numerous crashes since the latest update and his also violently crashed his pc after a while.

I have tested other games to try to reproduce the issue but it only appears to me Minecraft Realms that is having the problem

EDIT: After looking at the video of the source information. I have also noticed that it has corrupted the stream as the crash was so violent. The player does not recognise that after 8m 14s the PC froze out completely.