3 hours later

[havartii]

And were still playing with the mount bug. Did the devs just say screw it let them play on horses were going to bed?

[Kaelang]

Or maybe, the patch was release during the time that would cause minimal effect to those online, and a few of the team were sleeping. This post came up at 5:45AM for me, which by your comment, would mean the patch released at 2:45AM.

The team are volunteers, people sleep. A fix has been pushed to live.