Exported config cannot be restored

Hello, many greetings to all and to Riga,
I want to report a small discrepancy (ROS 7.3.1):

If I save the configuration of a device (hAP ac) I get these lines, among others:

/interface ethernet switch vlan
add independent-learning=yes ports=ether5 switch=switch1
add independent-learning=yes ports=ether5 switch=switch1 vlan-id=1
add independent-learning=yes ports=ether5 switch=switch1 vlan-id=11
add independent-learning=yes ports=ether5 switch=switch1 vlan-id=12
add independent-learning=yes ports=ether5 switch=switch1 vlan-id=99

This configuration cannot be restored due to a missing parameter in the first line.

This parameter should either be exported when backing up, or its absence should be accepted when restoring.

Thanks!