troubleshooting – Nikon d7500 18-140mm, problem while shooting 4k video in M mode

I have a problem with my dslr Nikon d7500 with 18-140mm kit lens. Whenever I try to shoot 4k video in M mode it doesn’t show anything on the Live screen, when I switch From M to P mode or any other mode I see everything through the live screen. I have set the resolution to 4k 24p, it works on every mode instead of M mode.
is there any configuration I’m missing?
Thanks in advance