When I assign a resource, save and without loosing focus on the cell try to assign another and save it breaks. See video reference on the following link:
https://drive.google.com/file/d/19qoWIkHJXBy8BMUoZc1nhWPJkgTCYlX0/view?usp=sharing
In debug, the whole page breaks and opens bryntum.module on text editor