Different results with same board and code

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1

I have a student who made a basic code which will print a statement. When I upload it on my computer, it displays as it should in the Monitor. When my student uploads it using his computer (same Arduino board and cord), his results are different. For him, it seems like the Monitor is displaying each word twice with one of the words inserted into the middle of the same word (ex. SUSUPRAPRA). I am assuming the code is correct because it works fine on my computer. Has anyone run into this issue before? This is all done using an Arduino UNO board. Code posted below:

void setup()
{
Serial.begin(9600);
Serial.println("Is");
delay(500);
Serial.println("Is");
delay(500);
Serial.println("IS");
delay(500);
Serial.println("THAT");
delay(500);
Serial.println("A");
delay(500);
Serial.println("SUPRA");

}
void loop()
 {

}
2

Please follow the advice given in the link below when posting code. Use [color = red]code tags[/color] (the </> icon above the compose window) to make it easier to read and copy for examination

3

I suspect a problem or bad setting in the Serial Monitor.

Which IDE version?

4

I am using the Arduino Web Editor from the cloud so I believe it is the most up to date version but I am honestly not sure.

5

I'd suspect some beta version, but I don't know about Web software.

6

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