This has been solved by itself. Im not sure why yet, seems like some shopify internal cache. It's not on our side, I made sure I was testing inside shopify graphql app too.

Hi,We started having issues couple days ago with a graphql query for retrieving  products from collection, with a filter for tag. Worked properly before.It doesnt return all products, but just one of 10. I checked 5 times that products are in correct...