There are some workflow cases that are not supported by the Jira v2 integration.
A workflow can be configures such that a screen can be assigned to a transition. These screen can contain mandatory fields. In such a case, Jira will not allow you to transition an issue without setting the filed value.
In such a scenario, using `/jira transitions` will result in an ephemeral post that an error occurred with the web response code.
We should consider adding the capability to support this by allowing user to set a value during a transition (possibly in a modal)
Steps: (config steps are still a bit uncertain to me)
1. Set a filed as mandatory
2. Create a screen and add the field to the screen
3. Edit the current workflow and add the screen form strep 2 to one of the transitions in the workflow
4. From Mattermost, use the slash command to transition a task with transition modified in step 3.
Expected: Not sure
Observed: An ephemeral post show the user an error occurs and the web response code saying to inspect the response body.