Spark despawn/removed when a lot of them are on the screen

Spark despawn/removed when a lot of them are on the screen rendering your increased duration useless because the server instance just deletes your sparks on the ground.
Happened to me a lot in rituals and happened today in simulacrum and that was the last straw... the spark just doesn't stay on the ground and disappears and then you cast spark but you get no spark casted and you die....

Same experience.

Level 96 Stormweaver, Mahu/Wand, 4.6mana, 4Kes, Ingenuity belt, 60-70 divine geared.

Can’t even get through a T2 Simulacrum because of this issue…