Station skipped by “automatic system”?

I just had a new experience. On a Rockaway bound L train this evening, we passed Jefferson and then, between stations, train came to a sudden halt. The conductor then announced that the next stop (Dekalb) had been skipped by the “automatic system“ and the next stop would be Myrtle-Wyckoff. We waited for a second— the conductor said the train needed to “reset.” Does anyone know what would have caused this? I didn’t realize this could happen and I’m very curious.