I could get my speed dial back on my laptop.
I'm using Opera on two phones, a tablet and a laptop. Synchronization is on at all devices. I did the following:
- 'Reset sync data' on https://sync.opera.com/web/#
- Signed off from Opera on laptop and each of my phones.
- Signed in on each phone.
- Once sync on each phone was complete I signed in on the laptop.
- Wait for a while and all Speed dial bookmarks got back.
I hope it helps you with the issue.