IronGod1640: Thanks for the response. If it is normal, then I'll try to mess around with it some more. I might not have been clear enough though, the mechanic walks up to the entrance (no one is in the line except for this single guest stuck at the entrance) and then it looks like he bumps into the guest and then he immediately turns around and walks away from the ride. I will note that this is the mechanic who is on-call to fix that particular ride. I have no foot paths set and this has happened for multiple rides. I only demolish the ride if it is a swinging ship or merry-go-round...something small and cheap. And again..the pincer icon to pick up a guest is not accessible. Nor did the mechanic decide to walk up the exit ramp either.
You're right that you can't pick up that guest in the entrance, he already counts as on the ride. He can't move on his own anymore, he won't leave no matter what unless you reset the ride.
What is your mechanic doing at the entrance anyway? Unless its a split station, one station exit only, one for entrance (iirc those are rct2 only) he should never use the entrance.
Two ideas. He might be completely lost, complicated long paths between exit and entrance do that sometimes. Try dropping him near the exit, this clears his job so wait for the call - can he get there now? Simplyfying your path network in the area is the only option to reliably solve this if it keeps reoccuring. If you keep having those problems why not assign them patrols anyway? You wont need more mechanics, usually less for similar/better response times.
Or maybe you managed to block the exit with a fence or wall? Those made of only two wires are really hard to see but just as impassable. Guests get kind of pushed out of the exit and might end up on the path anyway, so thats not a good indicator that it works. Look closely. And rotate the view, is the road really connecting and not a level too low if the exit is in the air?