Unable to cyst past Crevice (ns2_summit)

I was playing alien commander starting in Atrium and for whatever reason i could not cyst past crevice. I thought it was due to the hydras in crevice but actually the problem occured before the hydras were placed. I recorded the match and have some footage of the problem aswell as the hole match (in 2 parts because of size) uploaded on youtube.
Just the bug video.