I gave my bike to the mechanic a few weeks ago since I have had some problems with my Token bottom bracket. He mounted a new Rotor BBright 4624L on my bike. Coming back from a gravel ride yesterday I heard that there is sand in the bottom bracket somewhere and I took off the crank to clean everything. There I saw that the tube that usually is connected with the bottom bracket is loose. Hopefully you can see this on the pictures. I have never seen something like that before and want to know whether this is normal.
My bike is an Open U.P.