I'm building a Gantt chart in Apex 19.1 and have come across an odd issue. The chart "greys" out, almost randomly, when the page is refreshed, so it looks like this:
If I refresh the page repeatedly, it eventually comes back to this:
I'm using the data supplied with the Example Charts application and there it doesn't display this behaviour. There is no JavaScript code on the page that could cause this.
If you have experienced this and have found an answer, please let me know!