Both locomotives can pull heavy freight, hit a red signal and be stopped with EQ down from 5.0 to 3.4 but BC ??? 0.0 Bring down brakes from Full Service and BC rises to reach 3.3 when brakes are at Running. Hmmm. Scenario Designer 2.0 and yet ...
Just keep it on running and apply power. It will take some time to release the air from all the freight cars. Freight doesn't operate the same as passenger where brake release is almost instant and you move immediately