Crossbow Attacks Stop Firing

Crossbow attacks stop firing when holding down the mouse button randomly, and I have to click the mouse button to get the crossbow to re-engage. It's a start and stutter effect sometimes fires 18, stops, then fires 3, stops, and repeats firing all 26 twice, stops, and fires 3 more, etc. I have tried relogging, swapping servers nothing has helped it appears randomly.

This has happened on different Witchunters of mine that all have very high attack & skill speed. On high tier juiced maps this has very bad effects when i cannot consistently attack.

Please look into this