tvOS issue with aspect ratio changing in mpeg ts stream

My app uses TVVLCKit to playback MPEG TS streams served by DBS2 receiver. I currently use yestrdays nightly. Following happens:

you start plaback of a PAL stream (576i) showing old movie with 4:3 aspect ratio
advertisment block starts with spots in 16:9 -> stream plays back in 4:3, so it is too tall
stream switches back to 4:3 when movie begins again -> it is shown taller then 4:3

With every change of aspect ratio it gets worse. So the change of the aspect ratio is detected, but not correctly used for playback.

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