Persisting PXProjection not saving multiple tables

I am trying to make some changes to the TimeCardMaint screen. My goal is to join and load both the PMTimeActivity and CRActivity in one projection while being able to persist both.

However when I hit save PMTimeActivity is persisted while CRActivity is not, I get no errors so I am confused as what to do next. Can you please advise.

Attached is the projection EPTimecardDetail and below is the view in the DAC.

  [PXViewName("Time Card Detail")]
        public PXSelect<EPTimecardDetail,
            Where<PMTimeActivity.trackTime, Equal<True>>,
            OrderBy<Desc<EPTimecardDetail.date>>> Activities;

Also I have reviewed Understanding Acumatica's PXProjection Attribute | Acumatica Cloud ERP several times.