When I zoom in a plotyy graph yTicks don't update automatically

Hi. As written above, I want to zoom into a graph that was created with plotyy. When I do this, the yTicks don't update to the new limits that are visible. So it can happen, if you zoom too much, that you don't see any yTicks. I found the 'ActionPostCallback' function, but I don't get it work. xTicks are fine. Thanks a lot in advance. Best