Were you aware that the "t" in "often" is traditionally not pronounced?

(On the one hand it's a very common word, so someone learning English as a foreign language might have been taught the "correct" pronunciation. On the other hand, it's something that many native speakers of English, particularly younger and less well educated speakers, get "wrong" so teaching the "correct" pronunciation may be assigned a lower priority. Also, for all I know, perhaps the "t" should be pronounced in some dialects of English; I only know standard British English.)