Incorrect MuseSounds Muted Horn Pitch Mapping

Apologies, I created this in the Playback forum before but I guess it should be here.

I have had an issue with some notes on the muted horn sound having what seems to be the wrong pitches mapped for F4 and F#4 ( sounding B flat 4 and B4 respectively) which come out a semitone lower. It seems to be only these two notes which are affected.

I saw there had been a recent update to the Brass sounds which I hoped might have fixed it but it seems to be the same. I have attached a chromatic scale which should demonstrate the issue in the third-from-last bar.