recommended spatial solution causes ODataActionParams to be null

[MolallaComm]

I added a Point property to my entity following this guide:

https://devblogs.microsoft.com/odata/customizing-filter-for-spatial-data-in-asp-net-core-odata-8/

It seems a bit convoluted, but worked fine, in that I can query my "LocationDTO" entity and run spatial filters/orderbys as expected. However, now when I try to use that entity as a parameter for actions, it doesn't work anymore - for instance:

            var srvaddstep1 = builder.EntityType<ServiceDTO>().Collection.Action("AddStep1");
            srvaddstep1.Parameter<AccountDTO>("Account");
            srvaddstep1.Parameter<LocationDTO>("Location");

With the spatial column added, the ODataActionParameters in my controller function is always null - despite the fact I can see that the client is sending what looks like the proper JSON. If I comment out the spatial stuff in LocationDTO, everything goes back to working as expected (i.e. ODataActionParameters in my controller is no longer null).

Using latest/greatest odata on .netcore 8