Hey Ollie thank you for responding. To clarify I am using Unity Engine's Package Manager to include the AWS GameLift SDK into my Unity project using a git repository/ Tarbell file. I am new to Plastic SCM and partially new to Unity so I am not sure how I would go about producing a reprex for this particular circumstance. I don't have access to the code, at least to my knowledge, that handles the inclusion of such files into Unity Engine. Nor do I think I have access to Plastic SCM's solution for merging, unless you are speaking of the Workspace Explorer. The project and AWS SDK work perfectly on my device, but the package file is not updating in Unity's Library/PackageCache when performing a merge.
Originally the file did not even exist when performing a merge until I removed it from the ignore list. The file though remains empty now during a merge and I would like to avoid removing all the contents from the ignore list, as I have no idea what effects this would have.
If there is a means for me to produce a reprex for you pertaining to the merging of Packages in Unity via Plastic SCM, please tell me and I will post it as quickly as possible. I assume this to be accessable in the Plastic SCM application but, again being new I am unsure.