Excel file that contains unresolved formula will cause Confluence to loads indefinitely

Summary

Trying to preview an Excel files that contains problematic formula will cause Confluence to load it indefinitely and may exhaust Confluence resources

Steps to Reproduce

1. Have an excel file that contains an unresolved formula:
   
2. Attached it to a Confluence page
3. Save page.
4. Try to preview the page

Expected Results

Confluence will display the file, including the broken/problematic formula contained

Actual Results

Confluence try to load the page indefinitely
Also happens while trying to preview the attachment itself (by going to page tools > Attachments > View)

No error is thrown in atlassian-confluence.log

Notes

Obtain the sample excel file from the ticket https://support.atlassian.com/browse/CSP-151155

Workaround

Edit the excel file and clean up the problematic formula before uploading them back to Confluence