I'll link to the Issue reported on Curios Issue Tracker as we are not sure which mod is the main cause for this to happen. But a combination of Curios, Inventory Essentials and Inventory Sorter.

TheIllusiveC4/Curios#391

PS: The problem doesn't happen until both Inventory Sorter and Inventory Essentials are present will post in both.

You can blacklist container in config.
edit string list "inventorysorter:dummyplayercontainer"

I'll link to the Issue reported on Curios Issue Tracker as we are not sure which mod is the main cause for this to happen. [Vou criar um link para o problema relatado no Curios Issue Tracker, pois não temos certeza de qual mod é a principal causa para isso acontecer.] But a combination of Curios, Inventory Essentials and Inventory Sorter. [Mas uma combinação de Curiosidades, Fundamentos de Inventário e Classificador de Inventário.]

TheIllusiveC4/Curios#391 [TheIlusiveC4/Curios#391]

PS: The problem doesn't happen until both Inventory Sorter and Inventory Essentials are present will post in both. [PS: O problema não acontece até que o Inventory Sorter e o Inventory Essentials estejam presentes e serão postados em ambos.]

I only have the Curious and Inventory Sorter mods, and that's enough to cause the problem

This is confusing as by default, the curious mod doesn't actually add any more slots, or at least that's what's I found in my testing

Could you provide any more information for me to try and reproduce this in my environment