Yes, usually a week into flowers starting that's when it starts to make a big stretch outwards, you'll probably find it would explode in the next couple of weeks so wouldn't worry. My auto now did the same..looks like it's doing very well and very healthy. Personally I would wait for defoliation few weeks into flower and do very minimal if any at all. I'd only want to do it where buds are shaded to help them get fatter and take of as little as possible. I'm no expert though. Happy growing!)