I was only referring to the ixapplications dataset which is the config data. This data does not migrate back from docker to K8s.
The hostpath data is unimpacted and can migrate backwards.
The migration process was disclosed early for Community testing and the snapshot/clone process resolved then. TrueNAS SCALE Electric Eel "Call for App Testing"
In general, that process is transparent for users, but was particularly needed for testing. Only the early testers of a software version can have an impact on how the software operates and whether any improvements to a process are needed. Please get involved early to ensure your requirements are met. After that its add Feature Reguests for future releases.