Why is my loop running more than it should

Question

Just a little exercise with a do while loop.

do
{
Console.WriteLine("Press a key");
input = Console.Read();
ch = Convert.ToChar(input);
}while(ch != 'N');

if I have input N, everything is good
if I have input XXN, I see press key 5 times instead of 3 times

Why ?

I work in the playground
https://code.sololearn.com/cXzZUD8AV6oe

Answer 1

Hmm it works fine to me and I got "Press a key" × 3 with input "XXN" in Code Playground via my phone. 😶

Answer 2

that problem is in playground. If you go to a real compiler you shouldnt to have that problem

Answer 3

It is for inputs in loop