Picom sometimes stops running I get a GUI pop up [XFCE/i3-gaps]

[kodeb8]

I am running Mint XFCE edition, but I replaced the window manager with i3-gaps because I like the tiling workflow more. Because I can't use Xfwm's compositing, I had to install Picom. This works fine for the most part, however sometimes when I get a GUI pop-up, it causes Picom to stop, and I have to either reboot or re-enable Picom manually. I'm not too sure what are the conditions that causes it to stop. For example, when I go set a keyboard shortcut in the settings, on the menu where I type the command, if I hit "cancel", Picom will continue to run, however if I proceed to the part where I actually set the keyboard shortcut, and press "ok", that's when Picom breaks. The way I'm getting Picom to start running is I have this command set in "application startup" "picom -b --experimental-backend". Currently, my workaround for this is I have a shortcut that runs that command, so I can manually re-enable Picom whenever it stops, but this is obviously not ideal.