After installing root and services, everything works fine AFAIK.
If I want to uninstall services, I try to launch the "Services" script but it only asks me if I want to install it.
If I add a file "/mnt/secure/.pkgver" containing the string "v8-16-g8f1fb88", then uninstallation is possible.
I think there is an access right issue with the file, or it is removed somehow.
Tested and reproduced on
PB840 5.20.706, PB631 5.20.1527 and PB632 6.1.900.