I did a short test of 22.03.0-rc1/2/3 in an unprivileged lxc-container. Container has a config as in OpenWrt docs. dnsmasq refuse to start and system log gets these lines.
Sun May 29 17:37:00 2022 daemon.crit dnsmasq[1]: failed to seed the random number generator: No such file or directory
Sun May 29 17:37:00 2022 daemon.crit dnsmasq[1]: FAILED to start up
Sun May 29 17:37:00 2022 daemon.info procd: Instance dnsmasq::cfg01411c s in a crash loop 6 crashes, 0 seconds since last crash
However, dnsmasq starts ok with cmd /etc/init.d/dnsmasq trace, as it seems to start without ujail, so no meaningful info gets to trace log in /tmp.
dnsmasq works fine with the same container config on the stable version OpenWrt 21.02.3.
My guess is, the failure relates to dnsmasq ujail setup of release canditates in a lxc-container. ujailed ntp process is fine in the container.
22.03.0-rc1/2/3 rootfs were made with the image builder with OpenWrt default configs, no custom configs were yet injected to the container system.