They are not aligned because they are not in an uninterrupted column. All the tags across a sequence of lines where each line contains a tag are aligned. As soon as a line doesn't have a tag, the "tag column" is terminated. This is very much the intent and a strategy applied everywhere throughout gofmt (the same applies for comments).

Working as intended.

sure, i understand that. is there a reason why this way was chosen over the way i was describing?

@pvinis The reason it works as it does is because there was no intent to make it work differently than any other alignment. It's the absence of making a (different) choice.