Hi ostrov
I apologize for any inconvenience caused. I've just tested it on my local site and I wasn't able to reproduce this issue.
So please, I have to ask you to open a private ticket in order to provide us with your website credentials so we can take a look.
This is the link to open the private ticket: https://stockmanagementlabs.ticksy.com/
And remember to make a reference to this post.
Best Regards,
Andrea.