I find this to be an unfortunate limitation of the detail tool. Not exactly a bug but certainly not a feature. It is particularly strange with library parts where the lines and fills show in the detail but not the text. Since annotations can be turned off by layers, I don't see any advantage to this limitation.
This is one of the things that makes the detail tool unsuitable for enlarged plans. I really do like the tool for what it can do, but I am also very much looking forward to when it can do more.