It's also happening on the other Spotify apps as well.
As a band aid I have turned on Guided Access Mode. On your iPhone go to Settings>Accessibility>Guided Access (towards the bottom).
Once turned on just triple click the home button to enable and it will not dim/lock the screen. When you want to end it, triple click again. I don't really know how to enable this on the iPhone 10 but I assume it will be pretty similar.
Was hoping this issue would have been fixed by now. Spotify is awesome and this issue of the screen locking when plugged into power sucks. Making me think it has something to do with how it works with Apple’s IOS.
Hi, I'm having the same issue and would like it resolved, please! Having spotify open while plugged in would prevent the phone from engaging the auto-lock. Now it uses system settings and turns off the display just like any other app. This persists even after an app re-install.