As far as I follow, romuz fixed the problem by clearing timeshifting buffer. Yes, it solves the problem but creates another one: simply you lose that buffer. You cannot go back in time after that point.
I can confirm this issue, I cannot change channel either after pausing live TV (even though the OSD says I have changed to another channel, the show is clearly the same).
Actually, I can switch to another channel, but it tunes a third channel
Major issue for me. Worked in RC2.
Mutiseat, no log files as the problem is the same as all others.