Recurring Lock Screen

I'm running i3 on arch linux and am having a weird issue where I am required to type my password in several times in order to unlock the screen. The amount of times my password is required is commiserate with the amount of time the laptop has been ide. Overnight, dmlock will have so many instances that I can't type my password in enough times to get the screen to unlock and it's easier to restart!

Systemd triggers a script to lock things at boot, and xautolock handles things when idle.

➜ system cat dmToolLock.service
[Unit]
Description=User suspend actions
Before=sleep.target

[Service]
User=$USER (redacted)
Type=forking
Environment=DISPLAY=:0
Environment=XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
ExecStart=/home/$USER/scripts/lockScreen.sh

[Install]
WantedBy=sleep.target

➜ system cat ~/scripts/lockScreen.sh
#!/bin/bash
export DISPLAY=:0
export XAUTHORITY=cat /home/$USER/.Xauthority
dm-tool lock
sleep 1

➜ lightdm -v
lightdm 1.22.0

➜ ~ lightdm-gtk-greeter -v
** Message: Starting lightdm-gtk-greeter 2.0.2 (Oct 17 2016, 14:22:50)
** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf

Following http://www.mattfischer.com/blog/archives/254:

I'm not sure whether this bug would be best filed under the greeter or lightdm.

Am using the standard gtk greeter. Setup followed the arch wiki: https://wiki.archlinux.org/index.php/LightDM