[2023] Acosta bag flooding the Summit (what the...?)

Hi guys,
I think there could be a problem with the Summit rng. I've farmed gear for the last couple of days with 'backpack targeted loot' option enabled, and that's a list of exotics that I've collected:
5 acosta bags
2 lullaby
1 mantis
1 memento
1 ninja kneepads

I mean, FIVE Acosta and no Ninja bags? A 'bad loot day', maybe, but, you know, it' s somehow bizarre.
Is it just me? Does it happen only in the Summit?