Hi,
I created a custom field (Select User (multiple Selection)) and added it to a customer request type "IT-Help". My test user can see the field in the customer portal. Somehow he can´t interact with the field. If I type in something in the field, no suggestion pops up.
Hopefully my screenshots will explain more clearly what I mean.
Test-User view:

Admin-User view:

How do I fix this? Do I need to set specific permissions? If so, which ones?
Thanks und kind regards,
Mathias