Sometimes Night Light doesn't start

## Prerequisites
- [x] I have searched open and closed issues for duplicates.

## Describe the bug
Occasionally, after logging in, the night light indicator is missing and the color adjustments do not take effect. Making changes via System Settings (e.g. turning Night Light off and back on) doesn't help. After rebooting, everything usually works again.

Unlike issue #40, the indicator is entirely absent (as opposed to simply being invisible)

Unlike issue #47, the workaround (`killall gsd-color`) has no effect (`gsd-color: no process found`).

### To Reproduce
Steps to reproduce the behavior:
1. Log in.
2. Be unlucky.

### Expected behavior
Night light adjusts the colors as expected (provided it should at this time of day). The indicator is visible and

### Logs
Would love to provide helpful logs. Don't know which ones to share though.

## Platform Information

- [ ] I'm using the latest version from git that I've manually compiled
- [x] I'm using the latest released stable version

Using the proprietary Nvidia drivers: 440.64

## Additional context
Most of the time Night Light works.