Pbs Airing About Corruption June 1St... Mute

Yesterday evening, PBS aired a program about corruption. The broadcast was interesting and - to be honest- actually surprised me positively by the way it was addressing the issue quite straightforwardly.

Two guests (members of the anti-corruption body) from Hongkong were explaining how corruption truly affects the entire society, how the problem was addressed in their city, the results achieved so far and the necessary means and changes in hope to curb the disease. Talking in English with translation from the host, anyone could follow it.

But my biggest surprise came when the program became suddenly silent.

This very undoubtedly unwanted glitch let the viewers with only the image. This purely technical misfortune was solved... about 1 minute after the next program began. Topic: Thai traditional theater.

I was just wondering if this surely involuntary silencing of an interesting program about corruption only affected Chiang Mai area or if it had been nationwide?