[UPDATE: I WAS WRONG] Subscribe does not update on inactive Chrome tab

I have an app which has a list which is updated real time. I works as expected on Chrome active tab. But I found that on inactive tab, it looks like the subscribe paused.
I tested in firefox, it works fine.

There is a post which (I think) is related to: https://thenextweb.com/apps/2017/01/26/chrome-throttle-background-tabs-google/

Does anyone have this issue?

I’m sorry, I was wrong.
The problem is whenever a new item pushed to the collection, in the client I play a short mp3 file. Chrome blocks that. The subscribe works fine.