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The issue is hard to reproduce and I don't have a clue about its cause, but as you can see in the attached video, the labels of the Y-axis sometimes disappear when I make the window and, thus the chart, bigger. Actually it flickers, so it seems to depend on the control's width. If I make the window wider, it disappears at some point. If I shift the width slightly back and forth it appears and disappears stably at particular points. If I make it wider until the labels disappear and appear again, they don't disappear any more, if I decrease the width. So the area, where the labels disappeared before seems now "filled". The labels appear again, if I switch the series
via the legend or change the scaling in the browser, so it seems to be some clipping or painting issue.
I'm sorry, but I cannot provide a sample project to reproduce it. The issue doesn't occur, if I start the application from the Android Studio in debug mode, only in the deployed release, so no debugging is possible. Hopefully you can figure out, what it is. I have multiple charts in the app, but only one has this problem.