Issue on getting time seconds in a script

Hello,

I am getting a strange behavior while getting time seconds in Message execution log of a sikuli script : the first log time is after the second

Start TC at 2021/03/23 15:03:52
(some actions)
TC;OK;2021/03/23 15:03:27

while the script content is:
print "Start TC at " + time.strftime("%Y/%m/%d %H:%m:%S")
(some actions)
print "TC;OK;" + time.strftime("%Y/%m/%d %H:%m:%S")

Can anyone explain me this behavior and/or how to ensure my script gives the correct seconds or is this a bug ?