Why is there no vibration on Alarms?

[Windows Central Question]

So the thing basically is, I set up my alarm, but recently, the phone only rings but doesnt vibrate when the alarm hits. I know theres an option "Only Vibrate", and it actually vibrates, when i set it on "Only Vibrate". BUT I want to use a Sound and a Vibration as my alarm. So why isn't this working?
Am I missing some settings, i didnt change or what? Can anyone help me please?