ID 514880 - Material Ingest Tool can sporadically fail

Problem summary
Material Ingest Tool can sporadically fail
 
Customer reported version
Mari 4.8v2
 
Customer reported platform
n/a
 
Steps to reproduce
 
1) Download the attached .zip and extract it

2) In any project, open the Material Ingest Tool

3) Select Substance from the Presets dropdown
 
4) Select no template from the Material Template dropdown
 
5) Point the Search Root Path to the downloaded folder containing the textures
 
6) Set Ingest Method as Export Materials to Disk
 
7) Click Create Materials
 
Expected behaviour
The textures should be ingested into Materials and exported to disk
 
Actual behaviour
Many of the texture sets sporadically fail to ingest. During testing, at least one texture set failed to ingest correctly ~80% of attempts.
 
Workaround
The textures can be ingested successfully if the Materials are built in the project, rather than being exported to disk. To achieve this, set Ingest Method as Build Materials in Project.
 
Reproduced by support
This bug has been reproduced in:
Mari 5.0v3 - Windows 10 - CentOS 7.9
Mari 4.8v3 - Windows 10
Mari 4.8v1 - Windows 10
Mari 4.7v1 - Windows 10- CentOS 7.9 - regression
 
Unable to reproduce bug in:
Mari 4.6v4 - Windows 10 - CentOS 7.9
 
Earliest version tested
Mari 4.6v4 - This issue doesn't appear in this version and has regressed