So I am managing a team of people, all working on different tech projects, I am now being given a hard time with the development team for one project because I do not know their project as in depth technically as them. One member is now starting to undermine my authority, despite being aware that I am managing several projects at once (and not writing low level code) and have brought a lot of technical value in terms of the overall direction of the project he working on organising and as a software architect.
How do other project managers deal with this - I find with developer in particular, they have a habit to undermine if you do not know the technicalities as well.