Swapped an STM401 with an STM412 and having issues, JLCPCB incorrect model?

[Olligater]

As title really. Keyboard project i'm working on in QMK required a bit more RAM so upgraded from the STMf401 to an STM32F412xE. Flashed firmware onto it RGB animations and OLED work correctly but USB device not recognised by computer. STM32cubeprogrammer shows 1mb of flash memory so concerned if JLCPCB have swapped it out for another model which would potentially be incompatible or just striahgt upgraded to the xG wtihout mentioning anything? Anybody experienced anything similar?

[TDK]

What is the full part numbers of the chip you're moving from and moving to?

The part numbers are written on the package. Should be easy to read the top of the chip to see if what you ordered is what you got.