XF 2.1 Double Push Notifications On Desktop

[sip]

For some unknown reason (nothing changed on install) now the notification on mobile stopped and desktop I am getting two notifications for same trigger (like/reply/etc)
What should I check?

Google chrome - Version 73.0.3683.103 (Official Build) (64-bit)

 

[sip]

Still, this problem continues. Wonder if I have hit some bug?
Everywhere, I get two push notifications for each user action.