Whenever I play music in Noise, it pauses when the screen locks? Any solution?
It's not just Noise (the music app) but YouTube videos, Spotify, and all system audio stops/pauses when the screen locks (or machine suspends).
The easiest solution is to change the settings for when the screen turns off (turns to lock screen), which is set for 15 minutes by default in
Settings > Power. I agree that system audio should continue in the background when the screen is locked (it's not like the computer suspends). Subscribe to the feature request to track its progress.