Fuse Knuckle Cluster Jump | Movement Ability Interference

When I try to do the boosted jump using my Mouse4 button which is what I have movement ability bound to, it doesn't let me do boosted jump but when I unbind my movement ability it works perfectly fine, this happened before the rework implemented Knuckle Jumper into his base kit, and it still happens. I enjoy playing fuse and using the boosted jump but if I play him I have to unbind movement ability and my muscle memory for mantle boosts is all messed up.