Problem with adding queue simple for interface when it down

Sorry for bad english.
We have a problem when add simple queue with interface="pptp-" when the interface is down.
Interface pptp-
is a pptp-server type interface.

After run command

/queue simple add name="q_testuser_day" interface="pptp-testuser" limit-at=1024k/2048k max-limit=1024k/2048k burst-limit=2048k/4096k burst-threshold=1024k/2048k burst-time=8/8

We see bad queue in winbox without name and unlimited limits. But from terminal this queue don’t exist.

Is at a bug?

ROS v5.17
tested in ROS v5.21 - not working too.

Support, please check my problem.

Can anybody try add simple queues like me?