You had to drop down to this area and the only way out was a launch ramp over insta-kill fog.
I noticed odd behavior when I made two of these ramps (to go back and forth). I created a target_position and linked both ramps to that single target.
So, when the bots dropped down and picked up the Rocket Launcher they stopped moving and would stare at a wall until somebody started shooting at them.
I created another target_position to give each ramp their own target and the bots would use the ramps.
So to test this out, I created a map that simulated the area in the actual map that was giving me problems:

So, I've concluded that bots dont "see" launch ramps as they normally would if more than one launch ramp is assigned only one target_position between them. To prevent retardation, you should always assign target_position entities to just one launch ramp.