Trouble getting RPi4 to work

Hello @TheYoctoJester . I have yocto dunfell (3.0) project for RPi 4B with mender, and it works awesome. But I decided to upgrade to scarthgap (5.0) and followed this manual (Raspberry Pi 4 Model B - Yocto 5.0 "scarthgap" and later) to create core-image-minimal image with no customization at all. Image was created but the device doesn’t boot:

U-Boot 2024.04 (Apr 02 2024 - 10:58:58 +0000)

DRAM:  948 MiB (effective 7.9 GiB)
RPI 4 Model B (0xd03114)
Core:  211 devices, 16 uclasses, devicetree: board
MMC:   mmcnr@7e300000: 1, mmc@7e340000: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In:    serial,usbkbd
Out:   serial,vidconsole
Err:   serial,vidconsole
Net:   eth0: ethernet@7d580000
PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
PCI: Failed autoconfig bar 10
starting USB...
Bus xhci_pci:

Previous dunfell-based image successful boot snippet:

U-Boot 2020.01 (Jan 06 2020 - 20:56:31 +0000)

DRAM:  3.9 GiB
RPI 4 Model B (0xd03114)
MMC:   mmcnr@7e300000: 1, emmc2@7e340000: 0
Loading Environment from MMC... OK

I noticed that DRAM size differs. Could I ask why this happens, please? Thanks.