the same happens to me.. i sometimes wonder if its the medium algo not keeping up as fast sometimes.. idk.. i hope its a glitch, i want to have faith that most of us here who actually read and engage are really reading and engaging.. if not i will be very sad.
Plus i have read a friends article and them tell me no the read says 0 still.. and i will listen and read again, and it has taken a bit of time to catch up with the actual reads.. but who knows... medium is glitchy AF lately.