Desription

When editing the airtime of a Content Item in Schedule Block that is loaded from a current snapshot the UI allows to change airtime, but the change has no effect.

Steps to reproduce

1. Create new LP
2. Add new Schedule Block
3. Add new Content Item (in "now" timestamp)
4. Publish LP
5. – travel in time 3 weeks – (change server time 3 weeks forward)
6. Go to LP
7. Edit LP and publish again
8. Change airtime date of the Content Item

Expected result

Airtime of the Content Item is changed

Actual result

Timeline is moved forward to chosen date. Airtime of the article does not change