First of all put a fixed IP with DHCP seciton and Mac address for your TV. Restart your tv and verify IP assigned.
2th put a rule on HTTP proxy section put a rule :
source interface from you wifi lan
source IP : Ip assigned to your TV.
Destination IP leaves blank.
Clic on save button.
All traffic for your tv doesn’t be filtered by proxy.
I have same problem with Windows 10 update. They can not be run under proxy.
Hope this help.