Corrupted zones +1 area level mode is missing

Hi

Just want to ask if there is some change I've missed regarding the +1 area monster lvl from Corrupted zones...is it now RNG whether the corrupted area gets +1 lvl?

corrupted area +1 lvl: https://drive.google.com/file/d/1wbKFXysPI8l_nwIPF8kPAUHMDn3YfgjO/view?usp=sharing
corrupted area with no +1 lvl: https://drive.google.com/file/d/1ixfweq8fDeWUN0XqFb-T1paepYWThT2j/view?usp=sharing

I'm confused...before it was a guarantee to get +1 area monster lvl, right?

"Corruption areas no longer implicitly have +1 to Area Level but now are much more likely to have modifiers, and the modifiers can be more powerful. Some new Corruption modifiers have also been added."

all clear. thank you! that makes getting boss atlas tree points significantly harder...