Instead of using the predefined plugin styles to distribute the fields into columns.
Please follow the steps below:
Select the “large” option for the “Field Size” attribute in the “fieldname2” field’s settings.
Remove the “saptezecilasuta” class name from the fieldname2 settings and “treizecilasuta” from the fieldname16 settings, and use the col-sm-4 and col-sm-8 respectively.
I did the modifications in the browser’s console to check what would be the form appearance with the modifications: