How to reproduce:

• Have a variable widget with a variable of type boolean with checked checkbox
• Change type to integer
• Value field contains the value 'true'

Expected behavior:

• As 'true' is not a valid Integer value, the value field is highlighted in red

Observed behavior:

• value field is not highlighted

Hint:
Validation is correct, the ng-invalid class is correctly set. However, the invalid indicator css is only applied together with the ng-dirty class and the value field is pristine after the type change.