FSLogix profile size limit not set but capped out at 1gb

I wondered if anyone else had had this issue, The GPO for size of profiles says the default is 30gb, I assume by this it means if you do not amend the GPO then they get 30gb limit, However when i tried that today all users hit roughly aa 1.2gb hard limit, resolved by manually setting limit to 30gb but wondered if others had seen this.