It is not surprising because it has been seen many times; common occurrence.
屡多次；鲜新鲜，新奇。常常见到，并不新奇。
《史记·郦生陆贾列传》一岁中往来过他客，率不过再三过，数见不鲜，天久慁公为也。”
Such complaints are lǚ jiàn bù xiān in customer service.
Learn the next connected idiom: 屡见不鲜 (lǚ jiàn bù xiān) → 鲜艳夺目 (xiān yàn duó mù)
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