@kryouck-0 @Mercuryrev @live1one @rosgr100 and everyone else still experiencing this issue, thank you for your input and the extra details! We have been investigating this issue with Cloudflare, and neither Opera nor Cloudflare has been able to replicate it as described.
So, in a joint effort to improve compatibility and fix this for you, we need a bit more technical data from you.
When the issue happens again, could you please do the following?
- In another tab go to https://debug.challenges.cloudflare.com/
- Expand the Technical Details section.
- Click the Copy full results button.
- Go to Opera's Main Menu > Settings > Help and Feedback > Report a Problem.
- On Summary, add the title Cloudflare Technical Results, paste the copied results into the bug report description, and submit it.
This data will give us the exact clues we need to figure out what's going wrong. Thank you for your help!

