The issue was initially created under the R&D tracker and the status was set to Resolved. Then I changed its Tracker to Task. But The status was only showing "Resolved". Other status options are missing.
>Solution :
I got your problem. actually when your task is already resolved you have no permission to change task status from administration side.
a simple hack :
- change your tracker task to another one
- change status to New
- save the issue.
- go to edit issue again
- change tracker to task
- change status whatever you want
it will work 🙂