Importing Synty City Zombie Pack combines all zombies into one

[tiloc]

I am importing the demo scene from the Synty City Zombie Pack. Here is what it looks like when imported into Unity:

and here is what happens when I use unidot to import it into Godot 4.2.2:

each one of these characters is all characters overlaid over each other. I can individually drag them out of these messy piles. They also all seem to be lying on their backs, where Unity imports them standing upright.