this seems like QM001828716 - fixed in 8.6.
1. I created component template 'localProps2' with local property named MY_FILE_PATH.
2. I added part of type file to this template with name '??MY_FILE_PATH??'.
3. I ran discovery job with few Linux server.
4. I set value of MY_FILE_PATH property to '/root/b.conf' for all server component created.
5. I choose one of component, right click -> snapshot, this created snapshot job with type 'snapshot components'.
6. I ran this job first time, In job result server view shows that new baseline has no Change Tracking Information.
7. I modified content of 'b.conf' file and ran snapshot job again.
8. Job result mentions total changes as 1.
9. Right click under server view, click Export Change Tracking Result
Exported change tracking results should show exact file name and Changed target name.
Exported change tracking results shows File (??MY_FILE_PATH??), and no mention of changed Targets.