Tags are not saving in a draft

[ng-gist]

Expected Behavior

When adding tags in a saved draft and saving the changes, application should save my added tags.

Actual Behavior

When adding tags in a saved draft and exit out of drafts, application is not saving the tags.

Steps to Reproduce

1. Open the 1Rramp app and go to Profile.
2. Click on Drafts from the top navigation.
3. Open an existing draft. If there isn't one present, then make one by going to New Post/Blog.
4. Click on Next on the Title and Body screen.
5. Enter a tag on next screen and add space to add it.
6. Press back twice to save and exit out of draft edit screen.
7. Open the draft again to see entered tag is not saved.

• Device : Samsung S8
• System Operating : 8.0.0 Oreo
• App Version: 1.0