[Aliante]

I've already tried the advanced settings approach. Makes no difference.

Yes, i'm using UnoTelly as DNS service, but have enough bandwidth (75 Mbit/s downstream), so that shouldn't be the problem here. Also i've no issues with Teleboy's iOS app, tvOS app or the webbrowser. The buffering and termination of the active video stream only happens in Kodi.

Can someone confirm the buffering or am i the only one?

It could be that apps and web browser are "smart enough" to automatically select a lower bit-rate streams, while Kodi does not do this.

As a last resort you can change the max bandwidth in Kodi settings:
- go to Settings / System
- make sure your level is either Advanced or Expert
- go to Internet access
- experiment with "bandwidth limitation"
I suggest starting with 1536 kbps and then go up/down depending on your results.

This will force Kodi player to select one of the lower bit-rate streams offered by Teleboy
Of course this is a general setting and therefore it will affect all your plugins.

I have problems only while playing HD TV stream via WLAN and I switch on the microwave, but it does not really surprise me too much...