Canada snubbing US officials at the bridge opening?

So this new bridge is supposed to be a symbol of unity between Michigan and Ontario, but Canada just disinvited the US dignitaries from the ceremony. It feels like a huge slap in the face given how much cooperation is needed between the two countries. Is this just a localized political stunt or a sign of bigger diplomatic tensions brewing?

Source: https://www.bbc.co.uk/news/articles/cewr57kd21vo?at_medium=RSS&at_campaign=rss