[gamble]

As said i was getting Sound problems too out of nowhere, erasing my Userdata Folder completely and reflashing to 3.2.3 helped..

Yes, but I'm not going back to 3.2.3.

After waiting for years forced subtitles finally works properly with Gotham (it now finally feels like a Bluray / DVD player), as does FLAC 6.1 audio.

I don't meant that u should stop at the Stable built, but u can test if everything works and then flash up to Gotham again, hopefully with the bugs gone