Endless Arid Devourer Tonic
It sounds to me likely to be due to the sheer number of chest farmers available. Its sad but theres enough that maps that complete the event chains can be….consumed might be a good word for it. By a small chest train that begins to ferry more and more chest farmers in. As the number of chest farmers rise the number of event players begins to deminish. Soon the map is completely chest driven and will generally remain so for a few hours at a time. Theres enough chest farmers that theres almost ALWAYS an lfg open for one at any given time.
Ghost Yak
Haven’t really done much chest farming. Just mostly opened the random ones other people dig up or with my own shovels but I still got 2 or 3. Maybe it was never meant to be a super rare thing.