Game start running before the loading screen finishes and invisible textures/boss attacks

I don't know if it is happening in other maps, but it's happening in maven invitations and absence of mercy and empathy. I enter the portal, the load screen take 3 minutes and I'm already dead when it finishes, I can hear the voice lines while the game is loading.
This wouldn't be so much of a problem if boss attacks weren't invisible and killed me from nowhere

This happens to me on every map. Have to wait up to 45 seconds some of times for the graphics to render. During map bosses I can pause and let the game catch up, but Atlas bosses can't be paused and I failed the Writhing Invitation multiple time because of slow graphic loads.

Even just standing in my hideout the graphics never fully sharpen. It's like playing an old 8 bit Nintendo game.

It's so bad I stopped playing.

I encounter this issues also. No visible enemies or their attacks/ground effects, dying the instant you spawn into the Maven's Crucible. It really sucks because under these circumstances it's nearly impossible to get the Voidstones.

Also I'm constantly running out of high tier maps because not even the map bosses drop some and no currency to buy from Kirac.

I really hope there is a patch coming asap because in this state the game is unplayable.