Switch cases in a google sheets script failing to recognize certain cases when typed into cell, but work when copy+pasted - google-apps-script

Question

This is a very simple script and I have noted the cases that are failing.
The cases I tested the most was 'ts' when I type it into the cell, the value is not replaced, but when I copy from the script and paste it into the cell it does replace the value.
I have retyped that line of code multiple times to make sure that there is not an extra space within the quotes.
Any insight into why this is happening is much appreciated.
switch (e.value) {
case 'n':
e.range.setValue('=Sheet5!B1');
break;
case 't':
e.range.setValue('=Sheet5!B2');
break;
case 'i': //fails
e.range.setValue('=Sheet5!B3');
break;
case 'c':
e.range.setValue('=Sheet5!B4');
break;
case 's': //fails
e.range.setValue('=Sheet5!B5');
break;
case 'st':
e.range.setValue('=Sheet5!B6');
break;
case 'si': //fails
e.range.setValue('=Sheet5!B7');
break;
case 'sc':
e.range.setValue('=Sheet5!B8');
break;
case 'ts': //fails
e.range.setValue('=Sheet5!B6');
break;
case 'is': //fails
e.range.setValue('=Sheet5!B7');
break;
case 'cs':
e.range.setValue('=Sheet5!B8');
break;
case 'd': //fails
e.range.setValue('=Sheet5!B9');
break;
default:
return;
}
return;
}```

Answer 1

This works if you create and installable onEdit trigger since your changing values you can't use a simple trigger.
function onYourEdit(e) {
var sh=e.range.getSheet();
if(sh.getName()!='Sheet10')return;
switch (e.value) {
case 'n':
e.range.setValue('=Sheet11!B1');
break;
case 't':
e.range.setValue('=Sheet11!B2');
break;
case 'i': //fails
e.range.setValue('=Sheet11!B3');
break;
case 'c':
e.range.setValue('=Sheet11!B4');
break;
case 's': //fails
e.range.setValue('=Sheet11!B5');
break;
case 'st':
e.range.setValue('=Sheet11!B6');
break;
case 'si': //fails
e.range.setValue('=Sheet11!B7');
break;
case 'sc':
e.range.setValue('=Sheet11!B8');
break;
case 'ts': //fails
e.range.setValue('=Sheet11!B6');
break;
case 'is': //fails
e.range.setValue('=Sheet11!B7');
break;
case 'cs':
e.range.setValue('=Sheet11!B8');
break;
case 'd': //fails
e.range.setValue('=Sheet11!B9');
break;
default:
return;
}
return;
}