#3525540146fb should not have been necessary; tasklist.ui should not be hardcoding names of task list providers from other modules. Rather, they should be registered in those other modules.

Suggest perhaps an annotation @TaskScannerRegistration in spi.tasklist to be attached to classes or static methods assignable to FileTaskScanner or PushTaskScanner (better if these extended a placeholder base class TaskScanner with a package-private constructor?), which would register the scanner in TaskList/Scanners, possibly adding also a group using Task.createGroup, and optionally also registering the task type in some way that TypesFilter could load. E.g.:

package org.netbeans.modules.bugtracking.tasklist;
// ...
public final class TaskListProvider extends PushTaskScanner {
  // ...
  @TaskScannerRegistration(
    enabledByDefault=true,
    groupName="nb-tasklist-issue",
    displayName="#LBL_issue_group",
    description="#HINT_issue_group",
    icon="org/netbeans/modules/bugtracking/ui/resources/bugtracking.png",
    position="600")
  public static synchronized TaskListProvider getInstance() {...}
  // ...
}