.acf-admin-single-field-group .acf-field-object-flexible-content .acf-is-subfields .acf-field-object .acf-label, 
.acf-admin-single-field-group .acf-field-object-flexible-content .acf-is-subfields .acf-field-object .acf-input {
max-width: 100% !important;
}