The text area of TinyMCE HTML editor field is getting completely shrunk since Tokyo version - Known Error

The text area of TinyMCE HTML editor field is getting completely shrunk since Tokyo version Description Expandable text fields all shrink to minimum size in Tokyo next Experience UI in Polaris.

The text area of HTML field is noticed getting completely shrunk after Tokyo upgrade.

Steps to Reproduce

1. Login to any out-of-the-box Tokyo instance. 2. Go to Incident Form (incident.do) and Try to add a field of type HTML on the form using (Configure Form Layout). 3. Once the field is added try to minimize the Text Area of HTML field. Observe the Text Area becomes completely shrunk. 4. Trying the same steps 1-3 in Rome or San Diego instances shows the text area cannot be shrunk beyond a limit.

Workaround This is expected behaviour and by design starting from TinyMCE v5, as the height of the editor is considering both toolbar and status bars. Prior to v5, the height is set to the editor content area only, excluding toolbar and status bar.