When merging contacts, if the company field is empty the merge flow can automatically add a company that is unrelated to the contacts being merged.
Observed in the same merge workflow where other contact-merge issues were reported, but this should be tracked separately from the merge-page 404 problem.
Reference examples from the original report:
Current behavior: when there is no company selected, the merge flow can choose and populate a company that has nothing to do with the records being merged.
Expected behavior: if no valid shared company can be inferred, the field should remain empty and never auto-populate an unrelated company.