I have seen no mention of this on either this forum or the Last Epoch subreddit. The secret area in Heoborea seems to be inaccessible since the game was updated to not allow skills and attacks to be used in safe zones / Towns. Previously you would need to remove the flap on the tent to access it. This would require at least some damage to work. Currently there is no way of doing any damage while in the Heoborea safe zone. I dont think this needs a log or screenshot but I can update the post with them if need be.
Replication is easy, simply walk up to the secret area entrance. Look at it. Realize you cant open it. Done!