No notification on Android when clickURL is open

[mhusm]

If the clickURL is already open in Chrome on Android and the screen is turned on, the device does not receive any notification. If the screen is turned off, a notification is received and (when clicked) platinum-push-messaging-click is triggered, as expected.
On my desktop computer running Chrome notifications are received even when the clickURL is open.
I would like to update the page at clickURL whenever a notification is received, however, that works on desktop only. I suspect this is a bug, as the behaviour is not consistent across platforms. Or is there another explanation?