Hello,
Why unions falls? So, I add an brick on base so it gets welded and then as union it unwelds. Even I add an weld script, the train is unanchored, everything is welded. (I only have an base train).
Check the weld script
it most likely only applies to parts and NOT unions.
Unions=/=parts
Even not weld script as parts no unions it gets welded but tiny parts with others together it falls.
It can be any weld scripts? Like… Ex: 2.3 or something like that.