Giant white spiders as a miniboss

I may be wrong but. When I ran Alby int for four. I ran it four times and the miniboss never came up in the dungeon. Has some bug or update stop the Giant white spiders from spawning? Can someone please find out. I only play on Alexina.

Sometimes it's there, sometimes it's not.

Same with the Giant Red Spider.

I was running it yesterday and it appeared o.o; maybe it's not a 100% appearance or they changed the dungeon. o-o;?

I've ran it a lot of times, sometimes no White Spider, sometimes no Red Spider. Its one of the few dungeons that won't guarantee the miniboss' appearance.