After the conversation with Crhono, all the demigods return to their territories, worried about the threat of the beast. In their minds, they only thought about how to eliminate it.
The mere fact that it possessed an energy force that was unknown to date, which allowed it to hide from their perception, was a danger, and they wanted to eliminate the threat as soon as possible.
That is why the moment they left, they sent their forces and allies to look for the beast. They could not let it develop, and it was better to eliminate it before it became powerful enough to hurt them.
Amidst all this situation, no one noticed anything about the rejuvenation of Crhono, Sohei, Draneg, and the others. Their disguises were perfect, to the point that they believed that everything was as usual.