Hello Seungmin,
Unfortunately, I couldn’t reproduce that in our sample:
https://docs.dhtmlx.com/gantt/samples/06_skins/04_meadow.html
So, I think it is related to styles.
I have the following sample where the text can be moved to the right side if it is too long to be displayed in the bar:
http://snippet.dhtmlx.com/5/b51b7a3be
If that doesn’t help you, please, add your configuration in the following snippet and make sure that the issue is reproduced there:
https://snippet.dhtmlx.com/38ee1b370
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.
Thank you. Thanks solved the problem.