can't hide or disable fields in subform

can't hide or disable fields in subform

My Creator app uses sub forms.
As of today, the app produces an error if one or more of the fields in the subform are disabled or hidden through deluge script
The error message: 

Error in executing GENERATEJS_TASK task.

I verified this problem in a brand new form that only contains a subform with one field disable/hidden, so it can't be related to any of the other deluge code.