Sorry, I now have read the complete issue you have reported. You were not only talking about the squeak, but you wrote that there is no sound afterwards.
I've checked it with DAB Player and played my recording again and again.
The following red marked programmes are really silent in DAB Player after the re-configuration, the green are playing with a short interruption. BBC Radio 3 (marked in blue) still has audio, but the decoder cannot play it (wrong bitrate) and you cannot listen to it, see screenshot below and mp3 sample attached.
0 : BBC Radio 6Music (0xc22b) Pri subch=11 start=678 CUs= 96 PL=uep 3 bitrate=128
1 : BBC Radio 4Extra (0xc22c) Pri subch=12 start=774 CUs= 58 PL=uep 3 bitrate=80
2 : BBC Radio 1Xtra (0xc22a) Pri subch=10 start=582 CUs= 96 PL=uep 3 bitrate=128
3 : BBC AsianNetwork (0xc236) Pri subch= 7 start=486 CUs= 48 PL=uep 3 bitrate=64
4 : BBC WorldService (0xc238) Pri subch= 9 start=534 CUs= 48 PL=uep 3 bitrate=64
5 : BBC Radio 1 (0xc221) Pri subch= 1 start= 0 CUs= 96 PL=uep 3 bitrate=128
6 : BBC Radio 2 (0xc222) Pri subch= 2 start= 96 CUs= 96 PL=uep 3 bitrate=128
7 : BBC Radio 3 (0xc223) Pri subch= 3 start=192 CUs=140 PL=uep 3 bitrate=192
8 : BBC Radio 4 (0xc224) Pri subch= 4 start=332 CUs= 96 PL=uep 3 bitrate=128
9 : BBC Radio 5 Live (0xc225) Pri subch= 5 start=428 CUs= 58 PL=uep 3 bitrate=80
This is the content after the re-configuration. Green means no changing (see above, BBC Radio 1 and BBC Radio 2 play as usual). Blue are diffs:
Andi, it seems the DAB player uses the start CU instead of the subchannel. Can you confirm that? If yes, is it possible to change to play a subchannel instead?