Check 1 to 1 Nat public ip, returned internal ip address

[luzenkock]

my isp gave me block of fixed ip 1.138.69.33/29
my wan ip is 1.138.69.33 and i setup virtual ip 1.138.69.34 - 1.138.69.38
my webserver internal ip 192.168.0.36 configured 1 to 1 nat to 1.138.69.36
when i check https://checkip.amazonaws.com/, returned 1.138.69.36 which is correct
when i check http://checkip.amazonaws.com/, returned 192.168.0.36
nat reflection on purenat
enable NAT reflection for 1:1 NAT = ticked
enable automatic outbound NAT for Reflection = ticked

what am i doing wrong here? why am i getting internal ip when doing port 80 checking?