Just to get away from Covid19, I started having the same buffering/freezing issues again on TV One as described above by myself and @funnyfela. But this time I was on a different device and also had installed the @Apsattv IPTV list that does not make use of the merge/quality control add-on. In this way I was able to switch between the two. The add-on definitely creates the buffering and freezing issues. When not using it TV One is normal and has no problems. This does not necessarily apply to the Oz streams, though. When they start buffering the add-on is the only way to view them. I'm not sure why there is such a difference, but so far the problem only seems to occur with NZ streams.