[Bug] Atlas Passive "Disengaged Safeties" (Irradiated effect) not applying +1 area level

I'd like to report a bug regarding the Masters of the Atlas passive tree.
The node "Disengaged Safeties" under Doryani's Science states that "Map Areas are Irradiated", but the Irradiated effect is not working at all.
Evidence:
When I open a T15 map, the area level inside remains 79, instead of the expected 80 (which should be increased by the Irradiated effect). Furthermore, the item level of gear dropped by normal monsters is also 79. This confirms that the +1 area level mechanic from the Irradiated effect is not actually being applied to the map.
Could you please look into this?
Thank you!