Vibration when notification is received not always working

[HoreaM]

I just discovered this app and I find it very useful, but I also noticed a small problem. The phone vibrates on received notifications only if the app is open and the phone is not locked. If either the app is not open or even if the app is open but the phone is locked, the phone will not vibrate on received notifications.
I'm not sure if this was intended to work like this, but would there be a way to make the phone vibrate on received notifications even if it is locked or the app is not open?

[João Antunes]

This happens to me too.

I'm using Android Oreo, I will rate this app 5 stars if this changes

[Kevin Bedi]

There should be sound/vibration now if you update to the latest android version & npm package.