Thanks for the plugin.
I have recently experienced an issue with a custom entity where I have cloned name and address fields from the contact entity - i.e selected fields from address1 and address2.
In my new entity, since I exported the solution to a new environment, the fields are showing as permanently locked. It's only the cloned fields that are causing the problem. The form XML is fine, which would lead me to believe there is something peculiar about those fields now in the database that is causing the issue.
Has this issue been raised before?