I recently upgraded my iCloud storage plan to 50GB to accommodate my ~20GB photo library on my iPhone 6+ running iOS 9.0.1.
I then turned on iCloud photo Library and waited for the upload to begin. It seems to only be uploading anything when the screen is lit and the photos up is open.
I am judging this by the indicator of the number of photos remaining not changing and no network activity when the photos app isn't open.
Is this whats supposed to happen? I'll attach a screen shot of what its showing in settings > iCloud > photos
In the screen shot it will stay stuck on 3607, unless i open photos app.