I have never experienced this behavior.

It depends on what logic state you hold the pins at when the LCD powers up. mainly E and RS pins If I remember right.

It's more critical on TFT displays regarding the state of the reset pin when powering up.

 

Often times you need up to a second delay before doing anything with the LCD after powerup.
It might be a good idea to get into the habit of waiting a second in your code after the pin assignments before sending any data.[/QUOTE
You are write, It needs some time before displaying information.

 

Often times you need up to a second delay before doing anything with the LCD after powerup.
It might be a good idea to get into the habit of waiting a second in your code after the pin assignments before sending any data.[/QUOTE
You are write, It needs some time before displaying information.

It is not required to wait a second. It's neither good habit or bad, just not required.

 

Here are some wait states for the older LCD's.
Max.