Hope this is the right forum, there isn't one for "pager".
We have a datasource that is associated with a pager object - directly, not via a grid.
This worked fine in 2019/1 but when we updated to 2019/3 it stopped working - rather than having a list of page numbers left-to-right along the bottom, we just have a single page number with a dropdown menu associated with it.
This dojo illustrates:
Adding the setting
fixes the issue.
Is this an intended change in behaviour? I can't see it documented anywhere, and we don't get the same thing happening if the pager is associated with a grid rather than a datastore.