I have a website that triggers a warning when clicked through a link shared on facebook. The warning says: \"Possible problem with this link We have detected that this link
Ran into the same issue today. It would appear that it's a bug on Facebook's end.
Just by refreshing the Sharing Debugger will show me different error messages after each reload, including "Image Too Big", which clearly was not the case, and "Meta Tags In Body" which also was not correct.
As long as the correct image shows up in the Link Preview, I think you're good to go.