GameObject.Find vs GameObject.FindWithTag

I am unable to recreate the issue it works fine. But there are better ways to do this anyway. If you find the object once just store it, no need to find it every frame. When you are doing a lot of finding the GameObject.Find... methods are slow and consumptive. There's a better method, I see people explain on this site all the time, Idk what it is. But in your case you should just store after the one find.

Yes ... the best method (IMHO) is to use find in your 'onStart' event and store the gameObject or transform into a local 'Player' variable. Then in your update (or any other) local event you can access or change 'Player' information as needed.