I just uploaded new versions of two tracks to be included in a video game I am working on. I have been sending versions of all the tracks to my developers through this private playlist.
The two tracks were immediately region locked and neither I nor the dev can listen to/download them. "Not available in United States" the tracks says.
At first I wondered if SoundCloud may have been capturing an effect sample I used in the track that was also used in some copyrighted song (seen it happen before), but I've uploaded previous versions with no issues. And the mix is so dense and layered anyway. The newest version does NOT contain any new samples. Only arrangement, MIDI, and mixing tweaks.