Due to a switch malfunction at Lexington Av - 63 St this Downtown bound R160A M train got rerouted via the Broadway Local Line and supposedly ending at Whitehall St. However due to construction, there is no uptown trains serving that area, which only mean that the M train has to end at Prince St to layover at Canal St, turning back around for uptown service to 96 St - 2 Av.
I was with Transit Sylveon Hitomi along this video, his channel:
/ transitsylveonhitomi7777