When the number of multiple selections is large, the performance of the selections will be delayed
Hello,
I couldn’t reproduce the issue in the following snippet:
http://snippet.dhtmlx.com/5/f7334f9e6
https://files.dhtmlx.com/30d/c9a88e2e947887ffe7d3cc6fe5a5010e/vokoscreen-2021-09-10_14-10-15.mkv
Probably, the issue is related to the Gantt configuration, but it is hard to suggest what might be wrong as I don’t see your code.
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.