We're examining this bug!
If we find a fix for this bug, or we find that it is unfixable with reasonable attempts, this post will be updated with an appropriate response.
I plan on running through the 610 swep in the next few days, im aware of its bugs and issues. Ill look into nerfing the 610-1's slightly to allow for less extreme breaches but still giving players a fun experience.
Sadly this is a bug due to perma props and the barricade prop we wont be able to fix this as of currently. Thank you for highlighting the issue though.