Display validation messages with level info / warning

I would like to display validation messages with level info / warning in my application.

I modeled a rule with level warning. In the SME preview, the validation message is displayed.

In my application however, it is not displayed. I checked if it is somehow hidden by styling: no - as opposed to error messages, there is no div-element in the element-tree.

I assume there is a setting / configuration for the client / form engine that I am missing.

I have searched the corresponding documentation to no avail.

Ah, I see now, that it works in the client, though slightly different from what we see in SME.

In SME, the validation rule is triggered immediately and the validation message displayed.

In the client, I will get a confirmation dialogue only after hitting a validating button.