In our organization, I've set up Mapped drives for each OU via GPO. One of the drives seems to time out or something and it only happens on one mapped drive. none of the others are affected. If I open a File exlporer and select that mapped drive after a while (i don't know the timeframe) the file explorer closes. If they have a doc open from that drive it generates an error that the drive is invalid or something like that.
All the drives are set up exactly the same way.