Sorry for the late reply
Sometimes it's reachable but hard to find stuck in the bushes...just like the first short clip u can barely see the monster's feet sticking out...stuck in the bushes running (u will see the video blink which means next clip)...then the next clip...unluckily that battle...we are stuck in the same wave...I didn't manage to record the whole thing...but we actually search everywhere up and down within the boundary and search most at the front of the map where the last monster are most likely to be found..but no luck...went everywhere trying to listen to the sound to track monster..but no sign of it...
(or ...can... change it to spawn next wave...when we..destroy the flag??...just a suggestion....u can ignore it..)