Else, it leads to disparities amongst the markup previewer, and the baked content:
AI-generated summary
The discussion addresses issues with onebox thumbnail acquisition and markup preview discrepancies. roke_julian_lockhart points out that failures in fetching onebox thumbnails lead to inconsistencies between the markup previewer and the baked content, linking to a related report where preview images did not render. In response, haydenjames notes that the forum reporting the issue runs an Extended Support Release (ESR) version, suggesting the problem may not exist in current builds. They also highlight relevant code changes implemented in Discourse that might have already addressed or mitigated the issue.
Note the forum runs ESR, so may not be a current issue. Also there has been some related changes:
If it becomes a problem before the fix reaches ESR, I’ll run a periodic job to clear failed downloads and rebake.