ID 405867 - Scanning for versions doesn't work with UNC paths when using path substitution

Problem summary
Scanning for versions doesn't work with UNC paths when using path substitution

This only seems to effect UNC paths when going from Windows to other patforms

Customer reported version
Hiero 11.3v3

Customer reported platform
Mac/Linux/Windows

Steps to reproduce

1) On Windows, open Hiero

2) Import some footage from the network which has multiple versions using the full UNC path (//netdrive/folder not N:/folder)

3) Save the project

4) On Linux/Mac, open Hiero

5) In Edit>Preferences...>General, add path substitutions for the network drives, for example:

OSX: /Volumes/netdrive/folder/

Windows: //netdrive/netdrive/folder/

Linux: /mnt/netdrive/folder/

6) Open the Hiero project

7) Right click on the footage in the bin>Version>Scan for versions. It will say 0 versions found

Expected behaviour
For versions to be found when scanning

Actual behaviour
No new versions were found

Workaround
Use windows mapped drives, rather than UNC paths

Reproduced by support

This problem has been reproduced on:

Nuke 11.3v5 - CentOS 6.9 - MacOSX 10.13

Nuke 11.3v1 - CentOS 6.9 - MacOSX 10.13 - regression

Unable to reproduce bug in:
Nuke 11.2v6 - CentOS 6.9 - MacOSX 10.13

Earliest version tested
Nuke 11.2v6 - This issue doesn't appear in this version and has regressed