How to prevent ArcGIS Pro Arcade expression adding one month on to my desired date?

I am trying to add dates to two date fields in ArcGIS Pro using expressions in Arcade.

When I use the expression Date(2020,10,29) the result in the field is 29/11/2020, which is one month later than my desired date. The same thing has happened in the next field for a different date which should be 01/01/1983 but is resulting in 01/02/1983:

Does anyone know why this is happening and how to prevent it?