Yet again; once more — emphasizes that something has happened again, often with surprise or dismay.
またもや問題が発生した。
A problem has occurred once again.
彼女はまたもや約束を忘れた。
She forgot the appointment yet again.
ニュースでまたもや不祥事が報じられた。
Scandalous misconduct was reported in the news once again.