Expected behaviour
The bins range in the tooltip should be correct: 2-3, 3-4, 4-5
Actual behaviour
The bins range is incorrect: 2-6, 3-6, 4-5
Live demo with steps to reproduce
11.2.0 (current): https://jsfiddle.net/BlackLabel/vbns897g/
Works fine in 11.1.0: https://jsfiddle.net/BlackLabel/4arczejg/