I have a gantt chart with multi selection and inline editor (https://snippet.dhtmlx.com/ce2fcd425) but the editor only fires with a double click because the first click select the line.
Hello Lucas,
It is not a premium feature. Looks like, it is a bug that appeared in the 6.0.0 version and you are the first one who noticed it. Thank you for informing about that. I added it in our tracker, the dev team will fix the bug in the future. I cannot give you any ETA, but I will notify you when the fix is released.
Now, as a workaround. you can use the onTaskClick event handler and open the inline editor after clicking on a task cell in the grid. Here is an example of how it might be implemented: http://snippet.dhtmlx.com/de970f918