Sidebar in theme Creamy 6.1 (SeyDesign)

If someone is using the theme Creamy 6.1, tell me, is there a bug with Sidebar? This is a Preview of the program and this effect in RW 5 and RW 6.

Screenshot one and two.

In the theme Mirage 4 the same bug, and after export it is visible too.

Same problem here Wondrous, I just send an email about it to the developer. I will share a hopefully solution here.