It may be because of the uncertainty caused by the Canada Post strikes last month.
I don't think this has been fully resolved and there may still be backlogs and delays?
Maybe you will have to wait until you get your package back and see if there is any indication on the parcel why it was returned to you.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
