There is no word of the problem in their "Replace File" help article:
They also still have this article which they know is wrong based upon multiple reports (see the last quote below):
Here is a sampling of the responses we have seen regarding this issue:
Thank you for reporting this. I have forwarded this to our mobile engineers for a more in depth investigation now.
All the best
Thank you for contibuting on this conversation. We've forwarded your reports to our engineering team for further investigation.
All the best
HE SUGGESTS DELETING THE APP IS A SOLUTION THOUGH IT IS CLEAR HE KNOWS BY NOW THAT THIS IS A BUG
It sounds like your phone's cache my be playing tricks on you. Quickest way to sort this would be to delete the app, restart your phone, then download the app again. Please note that when you have synced content for offline listening (SoundCloud Go/Go+), you'll have to redownload this after the reinstall.
I've reported this to the relevant engineering team again. Can you please confirm whether or not pulling from top to bottom to refresh the app, refreshing your app data cache helps, or only reinstalling helps?
I'm sorry, but I have to confirm that this is a known problem - the mobile apps cache the old version. For any new listeners of your tracks, this won't be an issue, only you & people who have your track still cached on their phones are affected.
Unfortunately, I currently don't have an ETA for when this can be addressed, but rest assured that we've reported this to our engineers.