Check that the tooltip should not below the chart on the
Safari of IOS13.
(See Webkit Bug Trace)
The bug can be reproduced by:
(1) `-webkit-overflow-scrolling: touch;` is used
(2) The webpage is over one screen
(3) The chart (or only canvas) is not at the top part.
aaaSafari of IOS13.
(See Webkit Bug Trace)
The bug can be reproduced by:
(1) `-webkit-overflow-scrolling: touch;` is used
(2) The webpage is over one screen
(3) The chart (or only canvas) is not at the top part.
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