Want to know why updates go into formatter twice after annotation dragging

[w5c17]

Hello, I would like to try each comment to have its own line width and line color,I try this on formatter and the code is as follows

The above code worked when I just toggled annotations, but something happened when I tried to drag annotations。
The following is the output of my console. I did the following operations and drew two straight lines with different colors and widths. When I dragged the first line, I found that the annotations in the formatters were printed in the console for two times The second annotation,

In addition, I found that even if I changed the width of the line, it was still very difficult to select, but I should have clicked on the line, can you tell me how to solve it? Thank you for your answer