we are preparing our app for iOS 10. We just figured out that when we try to scroll or pinch on a bar chart on an iPad Pro 12.9, that the tickmarks and labels of the x axis alter as expected but the bars within the chart do neither move nor shrink/expand. There is no difference if we use the latest version 2.8.7 or the version 2.8.4. Fyi, it works on the iPad Pro simulator but not on a real device (we are unable to test it on an iPad pro 9.7).
It seems that there is no draw update on the GL view happening.
You are able to reproduce the problem with your sample project 'ColumnSeries'. Just add there:
Please see the attached pictures. When the chart is initialized then the tickmarks stand underneath of the bar but after pinching, the tickamrks are moved but not he bars.
Please provide a fix or workaround asap because last night (July 7th 2016) Apple made iOS 10 as public beta and we are expecting getting first user reactions on this soon.