Lost a lot of my ability points after a long break, why?

I just got back into Wynncraft after a long break, and decided to go back on my highest level character: a level 40 assassin. I distinctly remember before the break using Wall Of Smoke (the ability that makes you throw 3 smoke bombs) and was excited to fight some monsters. I throw a smoke bomb, but only one comes out. I decide to look at my abilities, and for some reason a lot of my abilities were refunded, back to the "element mastery" skills, and i had only 9 points, nowhere near enough to get all my abilities back. Any idea/explanation on why this happened?

 

When the ability tree gets changed it resets any nodes that got significant changes and that may then cause other nodes that are connected to that to get unselected too

 

But it refunded thunder master and backstab even though those seem unchanged