LaserPointer continuously flickers on/off World Space UI

I have a situation where the laserpointer works fine up until the point where I look at the force-directed graph that I am loading in-game. There is an OnMouseOver on the nodes, which are checking for a left mouseclick for selection. I am not sure if this is affecting it.

When this happens, the laser pointer position is duplicated / offset from original position and continuously flickers on the UI canvas where it was working before. The nodes in the graph have box colliders attached to them. I tried to disable the box colliders, but this breaks the graph, and also it does not make any difference as the issue still occurs.

Any ideas? I have a GIF to show this below.

https://imgur.com/NHuRAch
https://imgur.com/YPFcnrS

Unity 2018.4.23f1