Hello @Lukas_Frank,
Just for double check, are you testing the SDK example: flexspi_hyper_flash_polling_transfer? If so, did you modify something in the code? What have you modified?
Also, if you are using the example could you please send us a picture of what is displayed at the terminal?
Have you tried this issue on one of our boards (EVK or EVKB)? Is the issue there too?
If you are not using the SDK example nor have one of our boards (EVK or EVKB) for test, can you share a demo that we can use to replicate the issue?
Best regards, Raul.