if you click it, then you might see that the AutoHideArea stays open and the hyperlink works.
However, if you hide the autohide by clicking on another pane, and then hovering on the autohide pane header (so it will open), and click on the hyperlink, then there is a good chance that the autohide area will code immediately, and that the hyperlink will not execute.
I have traced this issue to be a focus issue, and I have "fixed" it by registering to a mouse down (or preview mouse down) on the hyperlink, and then setting focus on the first focusable ancestor.