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 ,