Widget with custom view does not show correct form when editing, happens since 6.2.11

Steps to reproduce

1.  Add new chart with data supplier is "Magnolia Recent Activities" -> Add chart to dashboard
2.  Click on edit chart
3. System show Edit widget dialog

.. Logs, screenshots, gifs...

Expected results

Dialog should show X axis and Y asix with Chart type is "Timeline"

Actual results

Dialog show combobox "Choose data"

Workaround

Development notes

dx core version 6.2.12-SNAPSHOT