Following steps causes unknown behavior in adapter create view,
1. Add a source
2. Edit its properties
3. Do not close the tab.
4. Re-add the same source again
5. Try editing the source.
It will show the tab that is already opened and with filled properties. But when you try to publish the adapter it will show that required fields have not been filled.
When we re-add the same plugin either close the existing tab or do not add a new reference (which leaves the opened tab hanging around).