Gantt: Workflow changes are not respected immediately, even after re-sync

Prerequisites:
When an issue is not editable in the Jira project configuration (jira.issue.editable=false) for given workflow status, it should not be possible to edit the issue from BigPicture.

Reproduction steps:
1. Create a new project and in its project settings set workflow for DONE property as an [jira.issue.editable=false] and publish changes.
2. Inside that project add a new issue and change its status to DONE
3. In BP create a new box with scope type OWN (e.g. Program Box) and add a project from step 1 to its scope and click the save button
4. Go to Gantt module and try to edit task created in step 2.

or
2. Inside that project add 2 linked issues and change their statuses to DONE
3. In BP create a new box with scope type OWN and add a project from step 1 to its scope and click the save button
4. Go to Gantt module and try to edit link between tasks created in step 2. (e.g. change lag time)

Actual result:
Tasks and link are editable. User can edit them even after reload page and re-sync (network tab still shows editable=true).
When user change status to other, and then change to DONE again, tasks and link cannot be editable (editable=false).

Expected result:
Tasks in status DONE respect workflow changes immediately. Especially after re-sync.
 
Workaround:
As above - change status to other, and then change to DONE again, now tasks and links cannot be editable (editable=false).