The music app playback has been identified by the team and working on it to fix as soon as possible.
For now please do this steps to resolve the music app playback:
Go to settings - additional settings - date & time - turn off Automatic date & time and enjoy your music.
•Regarding not responding of apps, please do reboot device, and also clear the data for that apps from Settings - installed app - tap on the app - clear data & cache.
Also if there is any update to the app please install it.
• Please do check the apps that are draining your battery and clear them from recents if not required to you.
Also run a battery cycle by using the device to 1% or less and charge the device full in switch off mode and turn on back and let it charge for 5 to 10mins and use your device. Hopefully this will improve your battery performance.