There is some random bug that occurs where mouse clicks aren't working properly for Web Access' control bar buttons. It behaves like the mouse button is released, and the cursor changes from the expected hand, to the standard arrow cursor.
On most systems, this seems to happen very rarely. But for some reason, it happens a lot on the conference Igel client.
I can see the issue with both Firefox and Chrome.
The issue can be seen with 4.14.0, as well as the development version.