Either they had a good two month run since November 14th, or they weren't sending out the service disruptions. The first one I received for 2018:
Dallas Streetcar Rider Alert 1/12 5:20a
Only one Dallas Streetcar is running due to a mechanical issue. Our apologies and thank you for your patience.
Dallas Streetcar Rider Update 1/12 11:00a
The Dallas Streetcar has resumed normal service with two streetcars running. Our apologies and thank you for your patience.