My guess is that it really is using a new chip with the old board design (why reinvent that portion if its works?).

I'm wondering if this is the new Samsung chip that has been in the news and that they simply don't work to spec?  This happened commonly in the "old days" back around 2014 with GAWs rebranded miners and other manufacturers.

If so, they are likely just dumping at a small margin to recover their losses while they work out whatever went wrong.

My 2 cents.