Bug that occurs when using JSONField and TabularInline

[Raphael]

Apparently the JSONField field modification in a TabularInline is ignored after a validation error.

To reproduce I attached the generated project based of the basic Django tutorial with changes to use a JSONField and TabularInline

user: admin
password: admin

Sequence:

1. Edit the Question
2. Change both Text field to "test"
3. Change both JsonField to 'test' (Any Valid Json)
4. Save
5. Edit again
6. Change both two JsonField to 'test 123' (Any Valid Json)
7. Delete text from Text field of the second item
8. Save
9. Error message will appear
10. Set the Choice Text field to 'test 123' of the second item
11. Save
12. Edit again, only the second JsonField was changed to 'test 123' (Any Valid Json)