Because it doesn't use survivor bots by default. So if it belongs to the survivor team, then he kills himself. That's why you see bots die at the start (Google Translate)

You can go to addon/d3bot/lua/d3bot/sv_config.lua. Lines 34 and 38, line 34 is the number of people, and line 38 is whether the human robot is enabled. If you only enable the human robot but do not set the number of people in the 34th. Then it will not appear.