Design Automation API work item stuck on "inprogress"

Question

I have a Revit add-in (C#) that I've converted to run using the Design Automation API. I've followed the steps to convert and upload the app bundle as well as make the required input files cloud-available. I've submitted two work items (as tests) and although they seemed to be submitted successfully, when I check on their status it seems stuck on "inprogress". Strangely enough, the status check also includes the time finished field (response shown below).

{
    "status": "inprogress",
    "stats": {
        "timeQueued": "2020-09-29T00:20:36.1972128Z",
        "timeDownloadStarted": "2020-09-29T00:20:36.4647984Z",
        "timeFinished": "2020-09-29T00:20:36.5533134Z"
    },
    "id": "CENSORED"
}

When I run this code on the same input using my local machine, the actual processing time is quite quick (~1min). The input files required to be downloaded aren't large either (~15MB total).

My questions are:

1. Is the timeFinished field with the status "inprogress" expected behaviour (it seems at odds with what is listed here: https://forge.autodesk.com/en/docs/design-automation/v3/reference/http/workitems-id-GET/)

2. Any ideas on what might be happening?

Thank you for your time and attention.

P.S. It's probably worth mentioning that I've used the local debugging tool (https://github.com/Autodesk-Forge/design.automation-csharp-revit.local.debug.tool) to test the Design Automation version of my code locally and it works as expected.

Edit:

I'm using Revit 2020 and the work item id is: b66d0ab15d9648bb8e614f42995aedc5.

After waiting a night and checking on the item in the morning, the status has updated to "failedInstructions". However, upon looking at the error report it seems that the job is taking 3 hours (which I believe is the maximum time allowed for the job) to run before failing. I've attached some of the report.txt (note the time stamps):

[09/29/2020 02:04:22] Initializing RCE....
[09/29/2020 02:04:22] Initializing RevitCoreEngine (and possibly running stub installer)...
[09/29/2020 02:04:22] Language not specified, using English as default
[09/29/2020 02:04:26] Initialize and  get RCE: (VersionBuild) 20.0.0.0 (VersionNumber) 2020 (SubVersionNumber) 2020.2
[09/29/2020 05:04:17] Error: Application revitcoreconsole.exe exits with code -1 which indicates an error.
[09/29/2020 05:04:17] End script phase.
[09/29/2020 05:04:17] Error: An unexpected error happened during phase CoreEngineExecution of job.
[09/29/2020 05:04:17] Job finished with result FailedExecution