My balcony tomatoes stopped growing until I moved them

I had my tomato plants in what I thought was a sunny corner, but they just stalled for weeks. After watching the light patterns, I realized a building shadow blocked them for half the day. I shifted the pots to a spot that gets morning sun all the way through afternoon. They perked up and started putting out new leaves within days. Ever had to rearrange your whole setup because of light issues?