My TV,as most of the others doesn't support HEVC streaming receive with DLNA,only local connected USB sources are supported.
Did you contact the manufacturer's support service? It is possible to correct in the following firmwares.
Of course i've contacted support already many many times.Everytime i got brief and clear reply "it's not possible" and "this is not limitation of TV"
So,after spending a lot of time by browsing specific forums,i know,a lot of people faced with the same problem.
The issue is-all UHD TVs support this feature on HW level,so does mine,but for some reason this feature is disabled by FW.And nobody knows when this limitation will be released...