New Annotation has created whenever ML model return new annotation

**Describe the bug**
After adding Annotation for task from `ML API`, new Annotation has created and `Submit` button will not visible. If I want to modify the annotation done by ML API then I have to switch to Admin annotation for that.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to label-studio URL
2. Create new project
3. Add Labeling interface and also ML API
4. Upload one task file
5. Now ML API will annotate data
6. Click on the task. Now you will see new Annotation as mention in above image without `Submit` button.

**Expected behavior**
Submit button should be visible so that we can modify the annotation done by ML API.

**Screenshots**

**Environment (please complete the following information):**
- OS: [e.g. iOS]
- Label Studio Version [e.g. 0.8.0]

**Additional context**
Add any other context about the problem here.