[2019] What happens to trapped zombies?

Originally posted by pecoes: I'm on the last map of the campaign and there's one zombie trapped in an enclosed area. He cannot get out and none of my units can attack him. I've also built various attack towers next to him but to no avail. Now I'm worried that I'll lose the map because I cannot clear it. Will that happen? Does anybody know?

https://imgur.com/a/riWMDax

Hello

This happens some times, try to do some noise or send a unit to the zombie.

Thanks

Regards