In our apps we are using Jira API to transition issues. In frequent cases, users have a transition screen on the workflow transition that asks to provide custom-filed data data during the transition and validate the provided data. As a result, the transition can’t be executed via API as the transition screen is not shown and the data is not provided. This blocks a lot of use cases and we, as a vendor, can’t provide a solution to our clients.
We believe that the most optimal solution to this problem would be adding a method to Jira JS API to show the issue transition screen but this option is not available in the API