I've seen this behavior (time update getting "stuck") on my local display, in Standard View, since at least the last 6 months. For me, the behavior is very occasional and I can't replicate it. It happens with audio and video, but it's usually audio. My fix is simply to restart MC. After that, it updates correctly, even on songs or videos that it wasn't updating on before. I'm fairly sure that this has happened to me on MC20 also, but I can't be sure.
I'm double sure it happens on MC21 because it happened this morning on 21.0.19 (for Mac) while playing a video.
Brian.