At the start of the video you can see that I'm able to drop my cash, in increments of $500 at a time, with no issue. However, after I pick the money up and try to do it again, it will drop $500 and close the Inventory menu for seemingly no reason. I am not manually closing it. I attempt to do this over and over again with the same results. At the end of the video, you can see that I'm once again able to drop in increments of $500 with no issue. (and yes, my mouse is hovered over the cash even though for some reason it doesn't appear that way in the clip)
I got a new PC last weekend and my keybinds are all the exact same as they were on my old PC. I've gone through every setting/keybind to try to pinpoint what the issue is, but I can't figure it out.