Alt clicking may crash your game

[Niko432]

Reporting client version: 515.1647

Twice this week i got an error stating "encountered an improper argument", this error made me disconnect from the game and I needed to either reconnect or wait until it does so automatically.

Both times it happened while I was alt clicking:

Once while alt clicking a syringe gun

And also twice while alt clicking a monkey trying to figure out how to remove it from a noose. And this time it seemed like the error was very consistent, happening every single time I tried alt clicking it