Breadcrumb navigation disappears after opening and closing document within Teams desktop

This will be my final update on this item. I closed our MS case late last week after I was suddenly unable to reproduce this issue on my devices, as was the individual in our org that was consistently having the issue.

We did not take any measures beyond obtaining logs and submitting them for review. The only guidance we received prior to closing the case was to take the usual troubleshooting steps and try closing Teams, clearing the cache, etc. -- things I'm sure everyone in this thread has tried before.

I hope this issue works itself out for others here!