There is an updated pull request by 4ricci against master on the void-packages repository

https://github.com/4ricci/void-packages runit-alternatives
https://github.com/void-linux/void-packages/pull/27096

exec package-specific ntpd in runit scripts, not the default alternative
If the default alternative is executed, then it will only work if the package is the default for that group, which is not guaranteed.
I wonder why all the packages having this issue are NTP daemons.

A patch file from https://github.com/void-linux/void-packages/pull/27096.patch is attached