I created a chart in which all values are under 20000 in the Y-axis, but one that is much higher (X:100). I wanted to do a detailed view, forcing the range of the Y-axis to 0-20000, but then the value in X:100 wouldn't show anymore. There seems to be the same problem at X:90, there's a spike missing.
The most desirable would be detecting values bigger than the top of the Y-axis and then cropping them, adding some ellipsis character like "=" to make it clear than they go on.
I attach both charts.