We prepared and released Turris OS 5.2.4 in the Testing branch! This release brings you multiple security fixes and bug fixes like download LXC images.
We do not cause this as the package ddns-script is maintained in OpenWrt packages feed. There is something wrong with the preinstall script. Feel free to create an issue Issues · openwrt/packages · GitHub
Otherwise, the update went smooth itself, and it should be alright.
This could be related as there is an updated lxc package. If you didn’t configure your LXC containers to auto-start after updating/restarting your router, that could be the culprit.