Blizzard have posted some new known issues regarding the Trading Post, after having re-enabled refunds earlier today.

Known Issues (Source)

There are some issues that have affected the Trading Post and we wanted to provide an update along with where we are at in resolving them.

We are aware of an issue where the completion credit for activities in the Traveler’s Log is occasionally resetting. We are actively working on addressing this issue and expect to have it resolved this week.

Some players who complete the Traveler’s Log are not receiving the Ash’adar mount reward immediately in their chest at the Trading Post. We aim to have this resolved this week.

Thank you for your patience.