EDIT: As of latest update, issue is now fixed.
The recent update bugged my Alliance's Photon Tree. Not only did it shrink, the photonic effects it gives are level 1. Despite the level being higher.
This happened to another alliance back in May. https://forum.pso2.com/topic/2549/our-alliance-tree-is-bugged
And there are also several others on Twitter who mentioned that their Alliance Trees are still bugged as well.
I have sent a ticket and have not yet received a response and it seems to be the same case with others who are experiencing this same exact issue.
I'm hoping by posting this here on the forums, the dev team can see and be aware that this is a recurring issue in the game. And several alliances, including my own, are impacted by this bug.