You are now no longer getting automatically back in Beastmode after dismounting.
This happens to me a lot, since you are jumping with your jackal or raptor around and then using the engage skill. Now, sometimes you do and sometimes you don't have your Beastmode for burst rdy. If you are just slightly above the ground after dismounting you have to go into Beastmode yourself, sometimes the pet gets even stored completely.
It's not gamebreaking but it is sometimes a bit confusing in hectic situations and can get quite annoying if you play something like RIBA, where you constantly dismount.
Edit: here's an even worse version, where you get a cooldown on beastmode after dismounting in air and where it stores your pet occasionally
1. Enter Beastmode
2. Immediately go on your mount before the Beastmode cd has run out (Entering beastmode gives leaving Beastmode a short cd)
3. Dismount in a way that you are in the air after dismounting
You now are no longer getting automatically back into Beastmode
You now have a 6seconds+ Cooldown on entering Beastmode
Occasionally your pet gets stored away.