Hi WIZZs ,
Do you perhaps mean this?
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If so, that actually happens because the mouse is currently on the button drawer when dragging.
The element of the button drawer is an <a> element and it's href attribute is "javascript:void(0)".
It's standard for a browser to show the link of a <a> element when dragged.
Please let us know if this was the error that you were getting when dragging the buttons! 🙂