Hi,
I have a couple of products (jewellery) where I allow clients to set the letter they can add, and the font: https://www.yourliri.com/product/fine-silver-initial-pendant-ring/
When you add it in Mauritian rupiees (I also have USD) instead of 1250Rp it ads 47000Rp which is insane… I found that it ONLY happens with the product where I have PPOM enabled, with no rules for multiplying or adding the cost to the total price, so I have no clue where it comes from.