Unable to download iCloud Photos
I am facing an annoying problem with iCloud Photos on my iPhone:
I have enabled the "Optimize iPhone Storage" on "Photos & Camera" App. I have signed the 200 GB iCloud Storage for the purpose of having all my Photos on reach.
There is a recurrent issue when I try to load older pictures. I can notice a "!" sign and blurry resolution in all cloud-based pictures, denoting a failure in sync. If I try to do anything else, edit for instance, I will get an error message like the attachment. It is super annoying.
I have read tips and recommendations from other users. For instance, I can temporarily fix the issue by disabling "iCloud Por Library" - that will reset all the Photo catalog when re-enabled. It makes me survive for 1 day, but next that's the issue again.
My device is an iPhone 6s 128 GB. On my Mac everything seems fine.
I have tried other procedures but no success. What else can I do?