Essences not dropping from the gargantuans

Hello, GGG support.

I would like to report a bug that happened at least 2 for me today since I have started essence farming.

I have noticed that the essences did not drop for some reason at least twice (probably 3 times cuz I have encountered this thing 3 times today). I am not sure which kind of gargantuan that was exactly though.

Maps:

Random tier 10's

Scarabs used:

1) 3 Harvest Scarabs
2) 1 Harvest Scarab of Ascent
3) 1 Harvest Scarab of Stability

Atlas nodes: all Essence atlas nodes except for the Crystal Resonance notable.

Can you please look into it?

Thank you,

Kennrouz

Edit:

Happens not only with Gargantuans.

Edit:

I've searched on Reddit for the information about the bug and I suspect it might be linked to the Lantern of Arimor. (I am playing in Necro Settlers league currently)