Google Photos - Not all photos are showing up on my new phone viewed in the app

[victor888]

Hi All, I recently upgraded from my Nexus 6P to a Huawei Mate 9 - made sure all my photos were synced to the cloud on Google and loaded up the Photos app on the new Mate 9.

For some weird reason, I'm missing about 6 months worth of photos when viewing on the Mate 9. All the photos are as expected when I access Photos via browser.

Has any one come across anything similar? Thanks in advance!