Joined: Mar 2014
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Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
This is why SRAM has said the "front derailleur is dead" not because it is dead and 1x is the best thing ever for everyone but because they are terrible at making a good front derailleur.
Many of the posts already provided great advice. Checking the alignment of the derailleur would be the first place but also checking limits and tension but I know with a lot of modern derailleurs they are oddly routed cable wise and that can cause problems, Shimano has done that recently with some of their stuff.