Multi field row in a "Container"

Hi all!
I have a question about Advanced elements> Container

I added four Basic Elements>Text Box into my Container (type -tabs area) and check "Start a Multi field row" and "Add to a Multi field row" etc. save changes but no row result🤨
Does it's work in "Container type tabs area"?

Hi russelld,

I just built a little test form and it works OK here.

Bob

Thank you GreyHead, I found problem in my template css. All ok😀