Apologies in advance for the vague bug report - this happens very randomly and I am not sure if there is a guaranteed way to reproduce it consistently without somehow inducing lag on your system.

Sometimes, clicking the mouse will keep it held down. This causes issues such as skipping through a bunch of text as if the mouse were held down when the player just clicks normally. It is as if the plugin doesn't register that the mouse button was released, and acts as if the mouse button is held down when it isn't. 

This doesn't happen often, so It is hard to say what is causing it. It seems that it might happen when there is a spike of lag while the player is clicking. I've noticed that this is happening more often to my players that are using lower end PCs.