A web app script I’m using for Google Sheets doesn’t seem to be working half the time.

It’s a timestamp that should also show the user ID of the editor. But most of the time it works for like a few seconds and then the user ID disappears:

Here’s a gif

Same gif via GIPHY

Here’s a gist of the script I’m using:

function addTimestamp(e) {

  var row = e.range.getRow();
  var col = e.range.getColumn();

  if(row >= 5 && col == 2){
    e.source.getActiveSheet().getRange(row,29).setValue(new Date());
  }

  if(row >= 5 && col == 2){
    e.source.getActiveSheet().getRange(row,30).setValue(Session.getActiveUser().getEmail()); Logger.log(email);
  }

What am I doing wrong?

Thanks in advance!