In both the initial loading and refresh case, the cell content goes through 3 states:
  1. Immediately, the static page content.
  2. Then, the snapshot, short after the field has been subscribed to.
  3. Finally, some real-time value, updated by Lightstreamer; this may happen after a long time.

You are probably not asking for the item snapshot upon subscription, hence the second state is skipped.
May you please confirm this impression?