21/04/13 06:55:33.13 o/c/TUJ6M.net
Due to logistic difficulties following the COVID19 pandemic, which have caused reduce air freight and border closings, PinePhone orders can only be shipped on their own, separately from other PINE64 products.
(掲載元) URLﾘﾝｸ(pine64.com)
上記の文において caused の直後に動詞の原形があるのはなぜですか。
reduce ではなく reducing にしないといけないのではないかと疑問に思っています。