NOTE: In this and future seasonal events, players are now all assigned random gift locations. No two players are likely to see the same set of gifts. This prevents cheating.
I believe the issue you are facing is due to this update. It's only occurring prevent dual gifts hunt and you are not supposed to see it.
Duplicate/uncollectable Xmas gifts
Locked
Bug has been reported and fixed, you now will only see the gifts that you can pick up