Issue Summary

Cascade select list field is going beyond the layout in the customer portal of JSM 5.7.0. Refer to below screenshot:

 

This is reproducible on Data Center: (yes) 

Steps to Reproduce

1. Create the custom field of type: "Select List (cascading)".
2. Add the field to some project and then the appropriate screens.
3. Make the field as Mandatory if needed.
4. Go to the customer portal of the same JSM project. 
5. And you will see the field going beyond the form as shown in the above screenshot.

If we uncheck the min-width by going inside the relevant element, the width becomes proper. Just putting it here, in case it helps. Refer in below screenshot.

 

Expected Results

The field should not go beyond the form layout. Tested the same in 4.20.11 JSM and the issue is not seen there.

Actual Results

Field goes beyond the form layout in customer portal.

Workaround

Currently there is no known workaround for this behaviour. A workaround will be added here when available