Silica pearls will be the death of me

I’m playing on the island map on ASA. I’ve gone to the upper west end and gotten them all out of the shallow icy coves, gotten all of them along the shores just north of that. They are not respawning. Ever since the first time gathering them all they have not come back and I’ve given many in game days before going to check. I’ve even tried going to scorched earth, gathering a crap ton and putting them in the obelisk, going back to the island and checking the obelisk and no pearls. WTH. Any other spots on island to get them? Any way to make them respawn?