Musicians: What piano chord is played at 2:59 on "Let It Be"?

Yes, and my WAG is that it might be a “bleed thru” from a previous take or even a different instrument. I know of at least two examples from Mamas & Papas recordings of the same era where that is the most likely explanation, and one “mistake” goes on for several bars. Not obvious in mono, but detectable in one channel of a stereo mix with good separation.