Here’s a thought I just had. Can a 500 Error happen when one resource contains a link to a now unpublished resource?
For example: https://www.bipc.com/2017-tax-act. (Broken link: Christine Boronyak Bowers https://www.bipc.com/christine-bowers 500.00 Internal Server Error)
I have come across a number of pages now that had links to many of the attorney pages coming up in the 500 Error results in Google Search Console. However this may just be a coincidence.