Section of map unaccessable

Bug Report ID: #3902434345

Cannot reach all of the map.

I noticed this because of Breach and the tablet that keeps the breach open if any breach enemies are alive. I found a corner I was able to shoot over too. but looks like there are 50+ more enemies left on this map still.

Map: Flotsam
Monster Level 77
Using: Breach, Abyss, Boss tablets

https://snipboard.io/y4pitz.jpg