Why this happen with my group?

[mateusproto]

Please, check if it can be the problem you are facing:

Repeating Group Responsiveness Bug

Our team has pushed a fix for this. Please go ahead and test this in your application to ensure that the actual behavior meets your expectations. You may need to first change a responsive setting (such as modifying a minimum width, or checking/unchecking fixed width) for the change to take effect.