Bazz CallBack pieces in widgets areas after upgrading to WordPress 5.8

Hi!

Since I updated WordPress to version 5.8 and its new widget editor, some Bazz CallBack widget pieces appear at the bottom of all my widget areas. View the screenshot: https://snipboard.io/OcWQCI.jpg

The three yellow rectangles are the Bazz CallBack’s pieces. The bottom rectangle grows and shrinks at the same rate as the blinking of the Bazz CallBack widget.

Fortunately, the problem is only in the widget editor, on my site the appearance of widgets and Bazz CallBack has not changed.

There is also an issue with another plugin in the widget editor, so the problem is probably more with this new widget editor and not from Bazz CallBack widget, but I wanted to point it out anyway.

Sorry for my bad english, I hope you will understand what I say !