Long lists not scrollable all way through

[YSO-kokous]

For example, when scrolling down YSO alphabetical tab with no letter selected, scroll starts from A and only reaches down to less than midpoint of the list. See attached image: could only scroll down to YSO's agentiivisuus (kielitiede) and not further. I was using Mozilla Firefox. When a letter is clicked, however, the list is scrollable all way through.

[osma]

Also affects LAJISTO in the same way. Only seems to happen on the vocabulary front page, not the alphabetical index page.

[osma]

The AJAX style request to fetch the complete alphabetical index is not triggered at all on the vocabulary front page. There is no activity in the Network tab when scrolling to the bottom of the list - unlike on the index page where the request happens automatically. Tested both Firefox and Chromium.

[osma]

I think the culprit is this line - the vocabulary home page loads the alphabetical index using AJAX style and patches in the HTML. The callback for loading more items (alphaWaypointCallback) isn't working properly (although the custom scrollbar is otherwise working) and the ajaxComplete callback only fixes this for some types of pages but not the vocabulary home page. Just removing the above mentioned if check seems to fix the problem, but it may have other, undesired side effects...