Spotify getting suddenly much louder on Samsung S5

[karma1]

I'm a Premium subscriber.

When I'm listening Spotify on my Samsung S5 Android, the music gets suddenly much louder after a while. This is painful, shocking and probably bad for my ears. I use many other sound applications, too, and none of them behaves like that.

Googling the net, I've seen people reporting the same problem for years.

Please fix this. This is a major problem and possibly a health issue.