He’s a Teeny tiny terrorist lately.
I have a young male parrotlet, Finnegan, 19 months old, who became very aggressive this spring. He is normally very sweet and all over both my girlfriend and myself. She is over a couple of nights a week but not full time so he prefers me but often sits on her shoulder. He became more aggressive to her but was becoming quite a handful. He likes to fly to the floor and walk around. He started attacking our feet. It is unnerving walking into the room and trying to find him stopping in mid stride. I started covering him at night to limit his sunlight and it helped to curb his behavior somewhat. He is still picking fights with wine glasses and his reflection in the toaster oven. Perhaps going back to work now will have some effect.
Try limiting the daylight.