A.H.
I've been a teacher for young children for 4 years now, at local Montessori programs.
I've repeatedly seen certain compliant children begin a new phase off resisting outside directives. It is part of their individuation process.
What to do?
Practice much patience. Look inward to see if the requests are essential. Sit down and engage with the child in her activity a while, and then when you are connected, do the transition/task together. Offer choices and connected consequences.
Parenting has been the greatest growth opportunity for me as well.
A Dad-written blog I enjoy is The Daily Groove - nice and insightful.
But please don't swat. It teaches her fear. Her processes are to be respected, children's work is important to them, and happens at a different pace than ours.
She will respect you as you teach her thru example to learn new ways to communicate your needs.