Compton Tryone only works once on install / reinstall

[jnlindsay]

Platform: Arch Linux, 5.2.10-arch1-1-ARCH

Screen setup: two monitors (1280x720, 1920x1080) with xrandr

CPU: Intel i7-7500U (4) @ 3.500GHz
GPU: NVIDIA GeForce 940MX and Intel HD Graphics 620

Compton version: git-v0.1_beta2-95-g241bbc5-2018-02-22

Steps of reproduction and current behaviour

1. I git clone'd the compton-tryone-git AUR package and used makepkg -si to install it.
2. I used the command compton --backend glx --blur-background --blur-method kawase --blur-strength 8 and it worked, but ONLY for the terminal Compton Tryone was started in. In addition, any new terminals I open are not transparent or blurred.
3. If I Ctrl+C in the blurred terminal and try to start Compton again with the exact same command in step 2, nothing happens. All subsequent execution of the command in step 2 does nothing, even after logging out or rebooting...
4. ...EXCEPT if I uninstall compton-tryone-git and install the vanilla compton, and then reinstall compton-tryone-git with makepkg -si. But then I'm back at step 2 again and compton-tryone-git only works once.

It's almost as if reinstalling compton overwrites some settings that allows compton-tryone-git to work.

compton.conf file

This is a copy of the original file /etc/xdg/compton.conf, which I copied to ~/.config/compton/compton.conf and added the following:

opacity-rule = [
  "95:class_g = 'Termite' && focused",
  "90:class_g = 'Termite' && !focused"
];

I can confirm that Compton is reading this file.