Items disappear on corrupted maps

I play Co-op with my wife and we have started to corrupt waystones, the problem is that on corrupt maps playing co-op the objects disappear (you see them for a second and then they disappear) and some simply stay the signal that there is something on the map and the filter light marker (the filter is not the problem,I have removed it and it continues to happen).It is frustrating to see very valuable objects disappear and not be able to level up.
And I take this opportunity to say that in Co-op mode (endgame) if player1 dies player 2 cannot catch waystones.Rituals and expeditions do not work either if Player1 dies and third ascendancy does not work in co-op, you finish it and when you go to the altar so that it gives you the points nothing happens.We try it 3 times.

I solved the part of the drops,I do not why,but there's an option in skills it seems an eye,but the other co/op problems continues