I have 2 desktops (one I use all the time and the other I rarely use Edge), a Surface Pro (1st gen), an 8" tablet (Nuvision), and a Lumia Icon.
All the computers are running some variant of Version 1809 and the phone is running 1709 (registry hack to make it think it's a Lumia 950XL).
I rarely use my Surface Pro and 8" tablet.
I turned on the 8" and it's favorites were blank.
Once that happened, my phone's favorites went blank.
I'm pretty sure that they were both synced with my main desktop (maybe an older sync as my list has been mostly the same for years).
I waited a couple days, hoping they would come back.
Then, I added a couple favorites on my phone, hoping it would kickstart a sync.
Those favorites showed up on my 8" tablet, but never showed up on the desktop.
I have since removed all the favorites from my phone, but the tablet still shows the phone favorites.
I wanted to check the Surface Pro, and it looked like it was in sync with the main desktop (again, must have been an older sync as a couple were missing).
While I was looking at it, they favorites changed.
They went from a full list to a partial list that was out of order.
As I'm typing this, the Surface Pro favorites changed again.
Now it's matching the 8" tablet (which used to match my phone, but now doesn't).
My other desktop had a partial list from the phone (must have been an partial or old version after it went blank).
Now, it matches the tablets.
Of course, all devices have sync enabled.
So, out of 5 devices, 3 of them match.
Unfortunately, it's not matching what it should match (main desktop).
My phone is completely blank.
If favorites won't sync, is there a way to import the favorites file that desktop Windows 10 exports on the phone?
Obviously, I can just import it on the computers.
I'm thinking about deleting the favorites from my main computer and see if it will sync with the other devices.
JJ