Certain office documents cause Confluence to have a perpetual loading circle when attempting to load the preview in Chrome. It is unclear what causes this behavior, but many of the affected files are office documents that have at least one chart.

This results in the error Uncaught (in promise) Error: Bad end offset for pdf.worker.js:

Workaround

Either...

• Disable the cache in chrome
• If using a proxy, override the header and disable range requests