Why is my Windows / WSL using "Very high" power usage for `cron` and `supervisor` services?

I have Windows 10 with Ubuntu 20.04.1 LTS in WSL. I have a Laravel app running via WAMP.

If I run sudo service cron start, Windows Task Manager shows "Very high" for "Power usage" for "cron".

Similarly, if I also run sudo service supervisor start, Windows Task Manager shows "Very high" for "Power usage" for "php7.4" background process, too.

And my PC fan is loudly spinning fast.

Running sudo service supervisor stop and sudo service cron stop of course kills the processes, and then my Task Manager is back to normal levels, and my fan quiets down.

Why is my Windows / WSL needing to use so much power for cron and supervisor services? How can I fix this?

I've never had problems with them when using a non-WSL Ubuntu system or when using Homestead Vagrant VirtualBox.