If you split your gatherer and try to build something other than a road, something that will consume the gatherer you will get a message: "The gatherer is unable to complete..." and nothing happen, you need simply need a complete squad so nothing strange about that.
If you mix your split squad of gatherer with hole squad of gatherer you will after a while get a CTD when trying to build something that are trying to consume a gatherer. Guess it trying to consume something it can't consume or something like that.
A strange observation: Those times I run in to a goody hut and get a gatherer early on I have a tendency to split them and use them as scouts, don't care if they die at that stage I prioritize scouting more. But while split my gatherer have never been attacked, don't know if this is is pure luck or a bug but I will keep an eye at it in my upcoming games.
If you mix your split squad of gatherer with hole squad of gatherer you will after a while get a CTD when trying to build something that are trying to consume a gatherer. Guess it trying to consume something it can't consume or something like that.
A strange observation: Those times I run in to a goody hut and get a gatherer early on I have a tendency to split them and use them as scouts, don't care if they die at that stage I prioritize scouting more. But while split my gatherer have never been attacked, don't know if this is is pure luck or a bug but I will keep an eye at it in my upcoming games.