-validated- & -confirmed-
Transporters save their target UID in the blueprint, so spawning in a new one will make all of their links point towards the original entity of where the blueprint was taken from.
Most likely the original entity doesn't exist anymore, so you'll end up with invalid links unless the newly spawned entity has the exact same name.
If the transporter UID points towards itself, or to a dock that is also going to be included in the blueprint file, it should set this properly when spawned so that the links are using the new entity instead.