Request Time in Nginx Log as always 0.000 for HIT Request

[anish10dec]

We are observing a behavior where request time and upstream response time is
logged as same value when request is MISS in log file.

And when there is HIT for the request , request time is logged as 0.000 for
all the requests.

Please help what could be the reason for this , we tried compiling from
source , rpm , upgrading and downgrading the version of Nginx. 

But always the case remains same.

Please help what could be causing this behavior

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,288938,288938#msg-288938