Hi Oleg Ilin,
I was able to reproduce the issue as you do and this behavior is definitely is a bug and I have added a work item for this.
We will work to fix it as soon as we are able to!
I also would like to thank you for reporting this scenario as it helps us improve our products constantly!
Please, do not hesitate to contact us if you have any additional questions.
Best regards,
Yavor Dashev
Smart UI Team