PDFs and annotations

Using DTTG - 1.5.8.

There are PDFs which contain contain annotations (highlighting, text). The annotations display in DTP Office, but do not display in DTTG.

If in the iOS device I use Open In… and then selected another PDF app the annotations show.

That annotations do not show in DTTG. Is this expected behaviour?

Will annotations show in DTTG 2?