( informal ) used to say that things often happen in a particular way, especially when it is not convenient
(THAT'S / IT'S) ALWAYS THE WAY
Meaning of (THAT'S / IT'S) ALWAYS THE WAY in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005