Stuck in The Viridian Wildwood

I am stuck in The Viridian Wildwood map. I was clearing and there was a yellow completely in the "black" area of the map. My minions killed it and I tried to pick up the loot. The black area didn't disperse like usual. It slowed me down like I was walking into mud. Then I was ported to a boss room(?). Where I saw a checkpoint, my portal, and an exit that wouldn't let me go through or provide anything to click on. I am still in the map as I see the last 2 yellow's I didn't get a chance to kill.

I just looked on the atlas and it says my map is complete. So that's good at least.

This just happened to me as well.

Just happened to me as well.