ERR_CONNECTION_RESET_

[mic.bummer]

Hi forum, i have problem with web site b2b.resortlife.travel.

I have different network, external ip-s, cities, local vlans adresses, but pfsense in all gateways, with different versions tooo, yeah i will update all soon.
I test that on 2.7.2/2.8.0/2.8.1 versions.

i already try traceroute, telnet, ping, Test Port, all tests successful, firewall show allowed 443 traffic from lan/vlan networks to this site in system logs firewall.

i alreay try change settings of
Disable hardware checksum offload
Clear invalid DF bits instead of dropping the packets

dns resolve ipv6 and ipv4 adresses, and i alredy try write adreses ipv4 to host file of client...

in all browser site open icon on tab, slowly loading and show error:
ERR_CONNECTION_RESET

how more i will resolve that?
i have this error just with that site, you will try on yout pf...
site open from other firewalls, like a keenetic, huawei, d-link
thanks...