GetChangeHistory() NullReferenceException in JArray conversion for Change with ProjectActivityItem changed from Null to Something

[vvkirik1]

Expected behavior

Get proper changeHistory of an issue by IIssuesService.GetChangeHistoryForIssue(issueId).Result

Actual behavior

In YouTrackSharp.Issues.IssuesService => GetChangeHistoryForIssue() at the end conversion from ActivityItem to Change via Change.FromApiEntity() proceeds, during which Activities with type ProjectActivityItem type setting From/To Value property with new JArray creating JObject from Activity.Removed and Activity.Added properties.
However, during JObject.FromObject() method ValidationUtils.ArgumentNotNull called which throws NullReferenceException cause of input parameter (Activity.Removed property in my case) being Null

Steps to reproduce the behavior

Try to GetChangeHistoryForIssue() of Issue that has ActivityItem like this:

---

{
"removed": null,
"added": {
"numberInProject": 1311,
"project": {
"shortName": "PRJCT"
},
"id": "95-6922",
"$type": "DatabaseIssueKey"
},
"targetMember": "project",
"category": {
"id": "ProjectCategory",
"$type": "ActivityCategory"
},
"timestamp": 1633610245836,
"field": {
"presentation": "project",
"id": "project",
"$type": "PredefinedFilterField"
},
"id": "0-0.76-8449959",
"type": "MODIFY_LINK",
"target": {
"created": 1633512386476,
"usesMarkdown": true,
"id": "74-543473",
"$type": "Issue"
},
"$type": "ProjectActivityItem"
}

---

[vvkirik1]

Any workarounds tho?

[rekolobov]

My apologies for the extremely late reply,
Issue was fixed in the scope of 2022.3.1