Hi, since sketch released shared libraries i've been working the same way: I have one library for the project, which has all the key components, for example, the sidebar and the top header. The sidebar component had a lot of links to other prototypes, and the sidebar have a 'Link Back/Close', so every time i have to start a new screen i put these two symbols and i'm ready to go.
I don't know since when, but this stopped working. Now the links that these symbols had inside, they don't go through the prototype, the only thing that make this work again is detaching the symbol.
I hope this can be solved because it's a big issue for me and for my project. Thanks