Ok, this issue was already resolved. Check the following issue on our GitHub:
https://github.com/highcharts/highcharts/issues/13807
This happens because the logic of handling multiple yAxes, which were overlapping each other had some flows.
This fix will be available in the next release. because of the complexity of the logic, it is hard to create an easy workaround. You can use the current master branch, or just try to avoid creating multiple yAxes, that are overlapping each other right now, or just add the series and yAxis right away like here:
https://jsfiddle.net/BlackLabel/13o6e2w7/
let me know, if that works for you! Kind regards,