As a temporary solution change default refresh rate to DVB TV refresh rate and you don't see this issue at start.
For me refresh rate set to 50Hz and iptv works without this bug.
This issue occurs only for refresh rate switching.
If it doesn't solve you problem than it possible DVB has another issue
Thanks, but the issue persists on any refresh rate i set.
First noticed the issue on a main system, which has a refresh rate of 50Hz to match DVBC.
Test system has 60hz, but i also repeated it on a 50hz system, same thing.
Sound stutters are the biggest problem, for now i would be able to live with the delayed starts.