Image rendering

Like the source, the image was expressed on the gantt timeline. However, when I drag the task on the right graph, the image is rendered continuously and the image flickers. Is there a good way?

Hello Seungmin,
Unfortunately, I couldn’t reproduce it:

Please, add your configuration in the snippet above and make sure that the issue is reproduced there.
Then, click on the Share button and send me the link.
Or send me a ready demo with all the necessary Javascript and CSS files so that I can reproduce the issue locally.