Hi,
I've been working on getting a gantt chart working the Navigator and keep hitting problems.
At random times when building my gantt from my source data I would notice that the navigator would no longer be resizable by dragging the range selector at the bottom. I've spent a lot of time trying to figure out the exact scenario that caused it and I could only boil it down to a js fiddle with two different date examples.
In order to make sure it wasn't something messed up with my options, I took the example from here:
https://www.highcharts.com/demo/gantt/with-navigation
Removed a bunch of data objects and changed the dates for two of them:
https://jsfiddle.net/methodshift/gtnh0yux/17/
in the second data object you can see two sets of dates. When using the first set the navigator works fine, when using the second they don't. The only difference is that the dates where the navigator works are within the same month, the ones that don't have a timeline item in the following month.
Does anyone have a clue why this happens? I can't imagine a good reason why the navigator would disable when you have multiple timeline items that span outside of the current month.
I also tested in Safari, seems to do the same thing.