How is snail set so scarce right now?

I can't get any snail armor pieces anymore. The drop rate seems like 0 after an update.

My friend wanted to play snail set but complain about how he couldn't get any with two totems. He bought 1 of every piece from the market but they didn't sell Snail Mail. He had only about 50% loot bonus. I mocked him and offered him my chestplate.

I gave him the armor I originally used, so I tried to get new ones. I went morph + Wybel Carved Relik.

I had 146% loot bonus. It wasn't a whole lot but it's good enough for grinding snail set. I popped 6 totems on snail island and I didn't get a single piece of snail armors. What happened there? Did I do something wrong while farming?