bug in Domo's period over period chart
It looks to be a bug in Domo's period over period chart. The March data is in the dataset and if I switch the card to a regular Bar chart for the last 12 months the data is complete.
Switching to the period over period chart and comparing for the last 12 months results in the issue you see. Also, the data for March and April 2017 have shifted by 1 month to April & May.