Why Podman API gives an empty result while listing the processes running in a container ?

Issue

*Why Podman API gives an empty result while listing the processes running in a container ?

test# curl --unix-socket /run/podman/podman.sock http://localhost/containers/d3f7844bb824c8ee931ca23a076305e10190aa382c77a7cfabaaa38126e286d5/top
test# 

While podman top works fine

test# podman top d3f7844bb824c8ee931ca23a076305e10190aa382c77a7cfabaaa38126e286d5
USER        PID         PPID        %CPU        ELAPSED               TTY         TIME        COMMAND
root        1           0           0.233       598h41m5.00176508s    ?           1h23m41s    /usr/lib/systemd/systemd --switched-root --system --deserialize 17
root        2           0           0.001       598h41m5.00206723s    ?           18s         [kthreadd]
root        3           2           0.000       598h41m5.002189878s   ?           0s          [rcu_gp]
root        4           2           0.000       598h41m5.002257708s   ?           0s          [rcu_par_gp]