i was taken back by this and figured it was a glitch or a bug. the myconid king isn't supose to show up untill all the wave have been defeated, right?
but just now i spent the majority of the second wave fighting him

has this happened to anyone befor? and dosn't he ussaly have two guards or something? (i don't ussaly do the fungus grove event, so this is kind of confusing)

I think it's an issue of the number not auto-refreshing on your page. Maybe you should refresh the page here and there to get an accurate update of the raid status just in case?

I've never had the problem before, so I wouldn't know for sure haha.

In this condition, the second wave had already been beaten, but since the top notice bar only changes after each battle or every time you refreshes that page, it looks like the number on the second wave stays that way.

That's why even though it says 51/123, it's actually only the king left. OuO

The notification bar used to update frequently, however, it was very taxing on the server so I had to reduce it to after battles end.

So if you finished a battle during the second wave and then let it sit there for a few minutes, explored again, and entered the battle.

It looks like the final wave had already begun.