Hi, I have an issue i could use some help with and would appreciate any advice. I find reverse proxying using a variable works for 9 out of 10 devices on my network, except for one device. For this one device, if I statically set the destination, everything works fine! I have tried almost every config option out there but can't get it working. Running on Ubuntu 16.04, Nginx 1.15.6. Strangely after updating from 1.15.5->1.15.6 it worked once (until reboot i think) after enabling proxy_ssl_session_reuse which is a new feature in 1.15.6 so it may be a bug relating to this. Disabling SSL on the device also works.

example config snippet:
WORKS
proxy_pass https://192.168.10.106;
FAILS
set $myupstream https://192.168.10.106;
proxy_pass $myupstream;

debug logs for working and not working found below:
WORKS https://1drv.ms/u/s!Ah8efbqjeU_lhKsoWzh19b5N7pOaHw
FAILS https://1drv.ms/u/s!Ah8efbqjeU_lhKsn8f16blsBh6XdhA

nginx.conf:
https://1drv.ms/u/s!Ah8efbqjeU_lhKspeCWnKqbB0phIHw