Toadstool help

[Sithmaster0]

Hi, I'm having a strange issue with my toadstool. This one hole started forming in the middle of my toadstool and a few more spots are starting to rot holes too. FYI this was taken at night and it's super healthy and beautiful during the day. Any ideas of what's happening?

 

[Tahoe61]

Lateral Fission. In a couple months you will have two.