I think it's incredibly irresponsible of the devs to have blamed everything except Qos when this obviously isn't unique to me.
I turn Qos off anytime I want to watch things on my Samsung SmartTV now. I gave up. When this router breaks I'm not using any router that uses netduma. A total shame bc I love the feature set.
Half the responses mention me having IPTV from my ISP. I don't have that. It affects multiple apps on the Samsung TV I bought. I understand IPTV is also a type of service, but calling my ISP doesn't fix this, turning off QoS fixes it. Why even mention my ISP, they aren't the factor causing this. I don't have anything other than internet from my ISP/Cable company.
The newest app on the TV that has the issue is Funimation. Can't load any video, but the exact second I turn off QoS with the video open, the video begins loading.