After further investigation, it seems that commissioning is setting different partition tables:
MAAS 2.5.0beta3 sets partition table to MBR MAAS 2.5.0beta4 sets partition table to GPT
After further investigation, it seems that commissioning is setting different partition tables:
MAAS 2.5.0beta3 sets partition table to MBR
MAAS 2.5.0beta4 sets partition table to GPT