I'm don't think it's the Chimera hunt gamemode as other servers run it fine but could it be the map?
There is only one map on the server for the gamemode so it could be the problem.
And i've noticed props flying off their places and sliding on the floor and fences with no collisions, so then a player could walk through it. All of this in ch_tazmily.
Then after UCH has finished other fretta modes are screwed, like dodgeball, stalker and garryware.
So could we test with a different map?
A different map could work, but as some people said, it could be LUA code errors.