I have a brand new bike with Ultegra R8000 SS groupset, and after 200km, today a noise inside of Bottom Bracket started.
And the sound makes me think there is water with dust inside the Bottom Bracket.
The weather conditions in Germany are not the best at the moment, and almost every bike there it's raining or there is water on the streets, but after every ride, I clean the bike with a humid cloth, removing the dirt, and also cleaning the chains every week, adding new grease...
Does it sound like a fabric issue? Or maybe it wasn't well tight?