自动放弃美国籍 is not automatically, it will be determined by US court paper eventually if DHS pursuit.
It is true that a natualized citizen entering US using passport of another country, DHS can, if they want to, pursuit to use that against you. But again, it will be court's decision.
It is true that a natualized citizen entering US using passport of another country, DHS can, if they want to, pursuit to use that against you. But again, it will be court's decision.