Good question. For my splitting, it is the Split tool that is in my Edit ribbon
I do not have split policies set up (and didn't know they existed until you shared that article!). So, my feature class should behave as the "default value". The default value says:
Default value—The attributes of the two resulting features take on the default value for the attribute of the given feature class or subtype.
If there is not default value, I suppose that it must be "null".... That's rather a pain. I want my splitting to go back to how things were in 2.2 and prior, which is apparently "duplicate value"
Duplicate—The attribute of the two resulting features takes on a copy of the original object's attribute value.
Now, I guess I need to figure out where to set my splitting policies. I did not see how to do so in a quick glance in the Settings, so I'll keep looking around. But, I guess this is likely the answer