odd audio problem on some channels (no sound)

hello,

odd audio problem on some channels
these channels are video radio channels (service type 130)
normal play channel No Sound but;

Hint 1 (surprise coincidence)
I press pause key (timeshift), then I press pause key again and the sound comes out (playing on timeshift)

Hint 2 (my own experiment)
channels open with exteplayer3 (5002) and sound is coming

in the attached log file, all actions (normal play + play with timeshift + play with 5002 exteplayer3) are available !

note: This problem exists for many years!

image: openpli-7.1-release-vuduo2-20190902_usb.zip
model: vu+ duo2

thanks!

@athoik @littlesat and other developer friends