HA OS on Odroid M1 only boots with recovery button pressed

Hello everybody,
I have an Odroid M1 and wanted now to setup Homeassistant OS on that board.
After a battle to get the petitboot version upgraded to 20230328 I flashed my eMMC card and inserted it into the M1 board.
The problem is that HA will only start with the recovery button pressed on the board and obviously I want to get rid of that! Can anyone point me into the right direction on how to achieve that?
I have read through this documentation and stumbled around this paragraph in the Technical note section:

The Home Assistant OS image is bootable by the SoC directly. This means that no help from the Hardkernel provided and pre-installed bootloader Petitboot is necessary. However, the ODROID-M1 automatically boots from internal SPI. To boot directly off the SD-card or eMMC you need to press the recovery button.

The SPI flashed U-Boot SPL tries searches for an U-Boot binary on the SD-card (and from eMMC with Petitboot 20230328 and later). This mechanism allows you to boot the Home Assistant OS U-Boot without pressing the recovery button.

But honest to say I do not know what that actually means.

Thanks for your help

So shame, that nobody replied ((
Having same issue, but with sd card
And when the power goes off and back on the HA doesnt start