Sometimes you’re in the middle of practicing in a state of relaxation, where you don’t think much. You might get something that looks nice, but find that it’s impossible to replicate the result. That certainly happened to me.
The purpose of practicing is to get better and to really improve your skill. We don’t do it so that we can say, “I have done it!” and then move on to the next target. Slow down and be intentional. Be aware of your thought process.
Once you got the essence of the pose, you can try it from memory.