Mount Problem after combat

I have mount problem casting after my chart combat with a mob ,it looks like moving and casting mount at same time ,last time it ever attempts till 89 attemtps .sorry for bad english ,here is my log
View attachment log.txt

 

I have done that ,already reset my wow keybindings ,even deleting cache and interface folder ,it just happen after my chart combating a mob ,if not all goes normal ,

 

Nope,my friend told me it doesn't matter ,I just put my mount on bar 3 button 1 ,my friend doesn't have a problem like me ,and the problem is just on vajir ,i try farmed on uldum or other area it doesn't have any mount problem,

 

View attachment Debug.html

 

In that log, it mounts just fine after combat.

 

Yes,it not always like that everytime ,2 days ago it worse ,but it seems better now ,but still sometime it need 3-5 attempts ,im sure you can see it in the log,
Acquiring Azshara's Veil: ( -7038,936, 3909,195, -467,031 )
Dismount to harvest.
Azshara's Veil is harvested. Harvest count is now 33.
Harvest attempt complete.
Maneuvering towards Azshara's Veil: ( -6981,936, 3980,818, -468,685 )
Moving to node...
Mount to Maneouver
Ascend to mount in Vash'jir.
Bar 3 button 1 to mount.
1 mount attempts.
Mount to Maneouver
Wait before another mount attempt.
Ascend to mount in Vash'jir.
Bar 3 button 1 to mount.
2 mount attempts.
Mount to Maneouver
Wait before another mount attempt.
Ascend to mount in Vash'jir.
Bar 3 button 1 to mount.
Mount sequence complete.
Blacklist this node.
Maneuvering complete.
Patrolling...vajir azshara
like this ,it's just an example ,sometime they blacklist the node too if there's a node near them when trying to moving to node but keep fail to mount ,

 

so anyone can help me about this problem ?