FCM push notification is not being shown on the active web device

I've come across some unexpected issue while using FCM for sending push notifications. I have logged in on my computer and mobile (web), when I hit the button that is responsible for event trigger, the notification pops up but not on the active device. If I hit the button using my mobile, the notification pops up on my computer and not on mobile. Similarly, when I do it using my computer, I'm able to see notification on my mobile and not computer. Is it an issue or this is how it's supposed to be? I'm using firebase-admin SDK with my Nodejs server.

Thank you in advance :)