Issue with posing code suggestions

I have what I consider to be a bug happening with my ability to pose suggestions on code that started yesterday.

When I attempt to make a code suggestion, the suggestion defaults to effecting not only the line I want, but also the line above it. Additionally, any new line break code actually creates new lines in my suggestions, instead of staying in the code, which messes up the formatting.

I have attached a gif of the behavior. Can anyone tell me if this is a known bug, or a setting I changed by accident?