Gentoo Linux VM: Parallels Tools causes repeated "fstab has been modified" warnings during emerge

Hello, i know Gentoo Linux not directly supported, but hopefully my problem is more general to linux, than related to gentoo.
I am running Gentoo Linux in Parallels Desktop on a Mac Studio with Apple Silicon. Parallels Desktop and Parallels Tools are both up to date. Parallels Tools are installed in the guest and working.
Before installing Parallels Tools, Portage/emerge output was clean. After installing Parallels Tools, every emerge command started printing repeated warnings like this:
mount: (hint) your fstab has been modified, but systemd still uses
the old version; use 'systemctl daemon-reload' to reload.

As far as I can tell, /etc/fstab itself is not actually edited at any time, and its content does not appear to change. The packages still build normally, so this does not seem to break the system, but the repeated warning is noisy and confusing.

I also noticed that running:
timedatectl set-ntp true
systemctl daemon-reload

temporarily suppresses the warning, but it later comes back. This makes me suspect there may be an interaction between Parallels Tools and linux time synchronization (systemd).
I am looking for the correct supported way to stop this warning without disabling Parallels Tools entirely.
Has anyone else seen this with a Linux guest, especially Gentoo or another systemd-based distribution? Is there a recommended Parallels Tools setting or workaround for this?