Why 'bloc_prefix' interfer with 'row_attr' in my formType

In my formType I've got my field :

->add('cultureParticipation', CheckboxType::class, [
                'label' => 'culture_participation',
                'block_prefix' => 'inline_switch',
                'required' => false,
                'row_attr' => [
                    'class' => 'hide-person',
                ],
            ])

In my css, I put a display: none to all .hide-person but all my field appear without the class hide-person. Now if I comment bloc_prefix, it works !
I don't understand why the block_prefix interfer with row_attr.

It doesn't work only if the field is CheckboxType for any other field all is ok.

Any idea ?