Issue Summary:

Forge custom fields do not render correctly in the old (legacy) Jira issue transition screen.

Steps to Reproduce

1. Install a Forge app that registers a custom field
2. Ensure the "New work transition experience" is disabled in personal settings
3. Trigger an issue transition that includes the Forge custom field on the transition screen

Expected Results

The Forge custom field renders its custom UI and validation logic runs correctly.

Actual Results

The custom field renders as a plain text area.

Workaround

The workaround is to use the new transition experience. This can be enabled at the user or site level:

• Individual users can opt into the new transition experience by enabling it via Personal Settings. This can be done through https://SITENAME.atlassian.net/jira/settings/personal/general?, enabling the New work transition experience.
• Site admins can contact Atlassian Support to request that the new transition experience be enabled site-wide for all users.