AutoCAD 2018 MAC XREF PROBLEM

[PharesOfThemAll]

I'm having a weird issue with one of my XREF'd files; specifically my Title Block file. When I attach the file, it looks to be referencing the correct file but once in PaperSpace it's displaying an old, nonexistent file.  Even in the preview window, it's showing the right file. 

I've tried Attaching vs Overlay, making the path Relative vs Absolute; I've tried detaching the xref completely, closing the drawing and reopening and reattaching; also doing this and closing & reopening AutoCad; I've even gone as far as deleting the old file & backups from my system and it still does this.  I'm wondering if something isn't syncing?  I haven't had this issue until yesterday. 

Attached is a screenshot.

Help!!  

Thanks

[maxim_k]

Hi Justin,

What if you will try to use XOPEN command to open Xref (title block) from the drawing in new tab?
When it will be opened, you can observe it and verify its location on disk.