f:all does not render JsonbMapType (Postgres) field

I have been using the Postgres extension in Grails 3. f:table renders the JsonbMapType field properly in the display, but not for f:all, in which the least expected to render is a text field.

Reproduce the Grails 3 form rendering with a PostgreSQL JsonbMapType field, comparing f:table with f:all. Start by tracing how each tag handles the field type; done means f:all renders the field, at least as a text field, consistently with f:table.

Written by the indexing model from the issue text.