Windows on fullscreen don't fit with screen


I’m pretty new to Linux and I decided to try and install manjaro on my pc today. I have 2 screens and I came across a few problems when I first booted, but I was able to fix most of them with xrandr. However, when I drag a window on my second screen and I put it into fullscreen mode the buttons on the top of the disappear and the screen seems like it’s more zoomed in and the edges are missing. I tried using xrandr to set the scaling to 1.0x1.0 but it didn’t seem to help (I use xrandr and not the system settings because it completely crashes my pc if I try to do any resolution/scaling changes from they system settings)
Any ideas on how to fix?