Yes that is. After the 100th time apple should really get the idea that I do that on purpose and don't care.
Warning pop-ups like mobile data being switched off for contacts when I open the contacts app, mobile data being switched off for notes when I open the notes app, and - amazingly - mobile data being switched off for settings when I dive into the settings menus. These 'alerts' drive me potty! Mobile data is switched off for these apps because I want it to be. I also have NO idea why my settings, notes and contact apps would need mobile data anyway??