Stop polling issues when creating new team res

Before this, team response might be created
at right the moment the issue is being polled.
This causes the error message to pops up,
as request to update label has been processed,
but request to create comment has not.

src/app/core/services/issue.service.ts

@@ -36,6 +36,8 @@ export class IssueService {
   private issuesPollSubscription: Subscription;
   /** Whether the IssueService is downloading the data from Github*/
   public isLoading = new BehaviorSubject<boolean>(false);
+  /** Whether the IssueService is creating a new team response */
+  private isCreatingTeamResponse = false;
 
   constructor(
     private githubService: GithubService,
@@ -80,15 +82,19 @@ export class IssueService {
    */
   pollIssue(issueId: number): Observable<Issue> {
     return timer(0, IssueService.POLL_INTERVAL).pipe(
-      exhaustMap(() =>
-        this.githubService.fetchIssueGraphql(issueId).pipe(
-          map((response) => {
-            const issue = this.createIssueModel(response);
-            this.updateLocalStore(issue);
-            return issue;
-          }),
-          catchError((err) => this.getIssue(issueId))
-        )
+      exhaustMap(() => {
+        if (this.isCreatingTeamResponse) {
+          return EMPTY;
+        }
+        return this.githubService.fetchIssueGraphql(issueId).pipe(
+            map((response) => {
+              const issue = this.createIssueModel(response);
+              this.updateLocalStore(issue);
+              return issue;
+            }),
+            catchError((err) => this.getIssue(issueId))
+          );
+        }
       )
     );
   }
@@ -193,11 +199,13 @@ export class IssueService {
 
   createTeamResponse(issue: Issue): Observable<Issue> {
     // The issue must be updated first to ensure that fields like assignees are valid
+    this.isCreatingTeamResponse = true;
     const teamResponse = issue.createGithubTeamResponse();
     return this.updateGithubIssue(issue).pipe(
       mergeMap((response: GithubIssue) => {
         return this.githubService.createIssueComment(issue.id, teamResponse).pipe(
           map((githubComment: GithubComment) => {
+            this.isCreatingTeamResponse = false;
             issue.githubComments = [githubComment, ...issue.githubComments.filter((c) => c.id !== githubComment.id)];
             response.comments = issue.githubComments;
             return this.createIssueModel(response);