I was tidying up my inventory when my MP5 duped (no video of this, however another video will be provided below of another issue), and I decided to take advantage of the situation and record the issues. I tried to move the MP5 with left mouse, nothing occurred, item stayed in place. Right clicking bugged with MP5 at random times (goes for all items), and other items allowed right clicking. MP5 did not go out of inventory compared to other items going into hands and out of inventory. Video of these issues are below.

https://www.youtube.com/watch?v=Qeo92JEfB9A