Problem with mmm in custom format on date field

I am trying to create a chart friendly Month Year field formatted as mmm-yyyy (Feb-2022) but the custom formatting field is not accepting the mmm-yyyy as a valid string.  Has anyone else run into this?

 

Month Year column is data type Date

But when I go to the model view to apply the custom format it is not taking the mmm as short month.

I input mmm-yyyy it converts it to MMM-2019

I am working on Version: 2.100.1401.0 64-bit (December 2021) that I just downloaded from the Microsoft site.

https://www.microsoft.com/en-us/download/details.aspx?id=58494

I have attached my sample file if anyone wants to look with it.