Can't deposit money order via ATM?

So just before Easter I deposited a couple money orders via the ATM in Quebec before I went back to work in Saskatchewan. Yesterday I noticed they were "corrected" and mailed physically back to my address. Spoke with the bank's teleservice and was told that you CAN NOT DEPOSIT money orders via the ATM. Has anyone heard this before? I could have sworn I've done it before. They were Canada Post payments.

Has anyone else heard/encountered this, or is Laurentian Bank just being difficult?