What happened with the inadvertent whistle?

[Scrapper1]

In the Bulls/Hawks game last night, it appeared that there was an inadvertent whistle late in the game. The whistle came immediately after the Bulls released a try, which was unsuccessful. This resulted in a jump ball in the center circle.

Immediately after the whistle, the official went to the scorer's table and jabbed his finger angrily on the table, making me think there was a clock issue. So maybe "inadvertent" isn't technically correct.

I was watching with no sound, because my wife was sleeping, so I have no idea what the reason for that whistle was. Anybody have any insight?