Hi I have recently connected Revit 2020 to my company's database however when using the design to fabrication button on runs of ductwork, it does not use the square bends, instead uses radius bends. When using the autofill exclusion tool and clicking the radius bend and then using design to fab, nothing gets inserted as if it doesn't recognise the square bend as a bend? 

is it due to the mapping of the buttons? if so where is the issue?

Please see attached images of button mappings and Revit screenshot

Many thanks