Invasion Boss Replaced with Vaal Boss?

Invasion boss from a leaguestone seems to have been replaced with its vaal area counterpart. This seems so have happened to me afew times now but this time double checked to report it. No challenge credit is given when its a vaal boss instead of an invasion boss.

Bug report number: 1,212,150,026

Another example in different area, with different boss.

Yeah I've noticed this too. I'm not positive, but aren't the names basically the only thing that is different?

Theres some subtle differences in the skills they use, base model is the same and they usually have similar themes, but they arent the same mobs.

Bug doesn't seem to have been fixed yet, heres another screenshot+reffernce number for teh instance it occured in incase that helps.

2,770,478,118

Yeah. I've noticed the same bug as well.
I often run the Fearsome Invasion Leaguestone of Abundance (supposed to have 3 Invasion bosses per use), but many times a Vaal Boss or Rogue Exile will show up instead of the Invasion Boss.

I went to low level lands (ie Cruel - Strand) where I couldn't be hurt and closely counted; safe to say the Invasion stone mentioned above is not working as intended.

Chiming in to say I noticed this too. The Vaal bosses often seem to be ones who can spawn in the area in corrupted side areas naturally. It happened to me while I was spamming tidal island and mud flats trying to get new invasion bosses with perhaps a 30% rate of vaal bosses appearing instead.

I can confirm i often get get a vaal boss instead of an invasion boss.
Is there a possibility this could be fixed.
It's really annoying when you try to get the invasion challenge done.

I have every leaguestone related challenge done, except for the invader challenge. I suspect this bug is the primary culprit. It's very disheartening when you chain invasion leaguestones and get corrupted area bosses half the time.