STAC item validation failure when using view extension apply

[tyler-c2s]

Currently getting validation errors when using the view extensions .apply() method.

Example:

view_dict = {'off_nadir': 0, 'sun_azimuth': 133.076479108908, 'sun_elevation': 33.4042972979731}
item.ext.view.apply(**view_dict)
item.validate()

results in:

ValidationError: None is not of type 'number'

Failed validating 'type' in schema['allOf'][1]['properties']['properties']['properties']['view:incidence_angle']:
    {'maximum': 90,
     'minimum': 0,
     'title': 'Center incidence angle',
     'type': 'number'}

On instance['properties']['view:incidence_angle']:
    None

this is not the case when directly adding each property:

"""
view_dict = {'off_nadir': 0, 'sun_azimuth': 133.076479108908, 'sun_elevation': 33.4042972979731}
item.ext.view.off_nadir = view_dict["off_nadir"]
item.ext.view.sun_azimuth = view_dict["sun_azimuth"]
item.ext.view.sun_elevation = view_dict["sun_elevation"]
item.validate()

the issue appears to be that when using the apply function, any non-included parameters are set to None, causing issues in validation