Game Crashing at Critical Points

I've had multiple instances where my game would crash during critical parts of game play.

For example, I was just running a Tier 15 Rare Waystone on a Stone Citadel and it crashed and I was not able to rejoin the instance. As a consequence, I will lose the stone citadel map location as I have failed it.

There are many other instances of such events. I understand that this is early access, but I did pay for the game along with many of my friends, who I play the game with.

This is quite frustrating and must be addressed. Thank you for your time.

Respectfully,
Eraser