Maybe it has something to do with the bindings in the saved script. We always clear this part of the script after saving it, as otherwise some scripts take way longer without this step. For this task I created two co-op scripts as powershell and batch:
If you want to try it first: Just open the .dyn file in editor and search for “bindings”. Everything between the following pair of brackets “[…]” has to be deletet: ‘[ ]’. Then save the .dyn file.