playback strange behavior

Hi

I noticed today a very strange thing.

I created my score with a very clear pitch.
I did playback and heard the right tones (right pitch)

Some noise around me started , so thought to use my headphone (with noise cancelling)
it is a Senheiser momentum 3
Then started to playback , and suddenly my score sounds a complete whole step down

So i did write it on D
play back without headphone = D
play back with headphone = C (noice canceling on, off does not change anything still C).

Very strange behavior.

I dont know if you aware of that , but wanted to send you this as it is very shocking , i thought something wrong with my score and need to re-write

thanks in advance.