Not that I know as a matter of fact but mere guess would be:I am unclear about the travel restrictions they're referring to. Did they mean the ones imposed by Indian Govt during this lockdown? Or, is it the restrictions imposed by Canada Govt before exemptions were put in place?
Since its the Delhi, India Visa Office, their FaceBook message post - it is likely taking into consideration both the local government directives and Canadian travel directives/exemptions.
Picking or writing with just anyone of these two factors would be bit short sighted and clearly unhelpful for making decisions for when to travel, what actions to take for delays or expired PRVs etc... no?