Lockscreen overlay sometimes does not respect X,Y coordinates of monitor

[Frewacom]

Can be reproduced by the following steps:

1. Plug in a second monitor
2. Move primary monitor (e.g. laptop monitor) to non 0x0 position
3. Unplug second monitor without moving primary monitor
4. Lock screen
5. Lockscreen overlay will not be visible

Most likely an issue with upstream dwl.