I am starting a new role, where I will cover multiple functions. Another manager just got promoted (just after three months, they might have had plans since his hiring) and changed his title to add one of the functions I'll cover.
I am happy and excited about my new role, but I am afraid of investing into something (that specific function, 30% of my time) that will lead nowhere, as it will be taken away from me: nobody is going to give me a promotion for a function which got moved outside my new team.
I am aware that this is a broader problem which primarily involves my manager, but I am interested in career advancement and I don't want to invest in a role which might get maimed soon. Should I maintain my awareness of the situation, or trust my manager to solve this and completely ignore this possibility until the time comes?