STEPS TO REPRODUCE
1. Preferences -> Satellites -> Show Satellites -> Show only visible satellites -> OK
2. Choose a location, e.g. Frankfurt, Germany
3. Pause clock
4. Set time step to 1 hour
5. Advance steps in hour.
OBSERVED RESULT
If there where satellites drawn, they will disappear at some point.
After a few steps more they come back.
EXPECTED RESULT
Satellites shouldn't disappear-
SOFTWARE/OS VERSIONS
macOS: 11.2.3
ADDITIONAL INFORMATION
Also tested in Windows via Crossover