Just a correction on my first post, OP was right, there is a question that asks if you have relatives living in Canada.
And yes, relatives in Canada is only one of the red flags, if the rest of your relationship is solid, it shouldn't be a big deal. They look at many red flags, not just focusing on one only.
How did your girlfriend get to know you? Did any of those relatives introduce you to her? How did it come about she's got a boyfriend from Canada, which happens to be where she's got some familial connections (even if not close)? Was it just simply chance that she met you in her hometown, and you just happened to be Canadian?
Just a personal question, but did you dye your hair? Or are you just aging well?