Petrified Amber event starts by itself/without being activated

I have had multiple instances of the Petrified Amber event being attacked by monsters, before I even went near it, and either letting me click on the tree and giving me 0 Amber to mine after killing the monsters (thats how I remember it at least), the tree already being mined when I arrive, or giving me x amount of Amber after killing the monsters hitting it (the miners appear after killing the last monster, even though I never clicked on the tree).

All of this happens without me having ever clicked the tree beforehand or often having even had it on screen (though i have noticed that in these cases it was already visible on the minimap).

The amount of monsters standing around and hitting the tree is also always very low, compared to the total amount of monsters that are spawned when activating the event normally.

The most recent case was in an Arcade map, where the only things I had done before was killing monsters and starting a Ritual (and maybe opening a random chest or two).

I discovered the event icon on the minimap before starting the Ritual and went to it after the Ritual. There I found a single Petrified Amber monster bashing the tree and after killing it I received ~730 Amber and the miners appeared (once again I never even clicked on the tree throughout all of this).

I have had a Petrified Amber encounter start automatically a few times in the Act 3 Imperial Gardens area (upper left spawn point near the Ascendancy Trial). I didn't even have to walk near it (let alone click) for this to happen.

I've had this happen in the Orchard map (T16). Approached the petrified amber tree and the monsters were already hitting it. I did not interact with the tree. After killing the monsters the tree awarded me ~930 amber (I am guessing the maximum I could get).

Bug reference 3,755,281,973.

I have now encountered this Bug in the campaign, where Petrified Amber tree spawned next to the Sarn Sewer exit in act 3 and there are already mobs hitting it. It even still says "Interact to begin the encounter."