Tvheadend

Hi,
i installed the TVHeadend (4.2.8 - Package that came with OSMC) on my RPi 4 (OSMC) . Everything works fine. But i have one problem with the second audio track (AC3) at all TV channels (IPTV). The TVH does not detect them. There is only one audio track (ACC) although there shoud be a dolby digital audio track. If i record something, there is only the ACC Stereo track as well.

It seems to be a similar issue like here: https://tvheadend.org/issues/5684

Here is a part of my logfile:
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: sdt: mux favorites.m3u - ProSieben HD in iptv
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: sdt: sid 0001 (1) running 4 free_ca 0
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pat: 0xb547c8: tsid 0001 (1)
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pat: sid 0001 (1) on pid 1000 (4096)
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: sid 0001 (1)
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: pcr_pid 0102
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: pid 0100 estype 15
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: type AAC-LATM position 0
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: language ger
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: pid 0101 estype 135
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: pid 0102 estype 27
2022-03-04 21:02:28.855 [ DEBUG]:tbl-base: pmt: type H264 position 0

And here is an examnple of one of the mux url:
pipe://ffmpeg -loglevel fatal -re -i "http://192.168.25.147:5000/api/wlm/live/rtl_ch_hd" -ignore_unknown -map 0:0 -map 0:1 -map 0:2? -map 0:3? -map 0:4? -c:a:0 copy -c:a:1 copy -c:v copy -c:s copy -f mpegts -metadata service_name="RTL CH HD" pipe:1

Do you have any idea how to fix it? I dont know how to compile (noob:()