What would the point of /mount be without it being able to used during Combat? Sure, you could run faster, but if you wanna go faster just use /fly. So, I believe the only changes that should be applied to /mount is that it should have a cooldown. That's it.
I've already brought the problem to Maarten, he's currently busy, and will address it when he has the time.
Snapcraft - the ultimate Minecraft experience! Join our thriving community and enjoy a diverse selection of game modes, including Factions, SkyBlock, Prison, Survival, KitPvP, and more.
Come join us now at: play.snapcraft.net
If you have questions or concerns, please feel free to reach out to us via email or submit feedback on our community forum. We're here to help!