@ihor this is the same issue as described in my bug report in this thread: Changing order status to complete gives user an extra listing for free - #8 by Laconicsky
You’ve just confirmed in that thread that the bug exists and you’ll be fixing it.
The issue and reproduction steps are exactly the same.
EDIT - there’s no point using my WP admin access to try and reproduce this either as I have the workaround described in this thread active.