The Memory Eater

I have the quest of the title that says:
-Collect the shaper's memory fragments (2/15)
-Complete any elder influenced tier 8 map

I've killed the boss of Dunes map ( tier 8 ) but i still have the quest..
Can someone help me to understand why?
Thanks

The map needs to have elder influence. The easiest is let it spread by doing adjacent shaper maps that are directly connected to an elder map.

it was elder influenced on the atlas, try to right click on the mini image and click show image.... is this a bug?

Did you pick up the quest drop from the boss after killing it?

he drops nothing.. i thought i might was the filter but i also tried without it...

Make sure that your that your t8 map is elder influenced (tentacle blob on the map) and not shaper influenced.

The maps that can drop the Memory Fragments for those questlines get a purple circle around them on your atlas.
Make sure that they have said circle on them before running it.
If they don't have it, the criteria for the questline are not met.

Did you do shaped dunes instead? Did you kill the boss with a different character, than the one that opened the map?