Manitobans are the worst offfenders on the "bag"/"bayg" meter. If anything, it's the trademark of their accent. It isn't until I point it out do they hear it. anything that Americans (californians especially) say with the short A sound that ends with a hard consonant is liable to be mangled by a manitoban. If you aren't hearing it, it's because your accent is getting in the way (the one you probably swear you don't have).

Ontario residents mangle their A sounds a little different. when you have an "ar" combination in a word, they pronounce it like "air", but as if you're simultaneously having a mild stroke. "Marnie had an Enlarged Heart" is always fun to hear one say.

Raised in Winnipeg from a very early age. My wife who is also from Winnipeg speaks the same way.

I have a lot of relatives in the Midwestern U.S. (specifically Minnesota), and you encounter that pronunciation in that region. I have no idea if it spills over into Manitoba or Ontario, but if it does, the location seems right for it.