Single sheet name not shown

Using SimpleXLSX php class v0.6.4 together with your example file 'countries_and_population.xlsx'

$names = $xlsx->sheetNames();
echo "\r\n\r\n<br>names Array:<br><pre>";print_r($names);echo "</pre>\r\n";
offers as expected:

names Array:
Array
(
[1] => &#1051;&#1080;&#1089;&#1090;1
[2] => &#1051;&#1080;&#1089;&#1090;2
[3] => &#1051;&#1080;&#1089;&#1090;3
)

Instead
echo 'Sheet Name 2 = '.$xlsx->sheetName(2);
like your example 4.2, presents no result.

Could you please advise me?
Thx

try 0.6.5

Working well now with v.0.6.5.
Thank you for your immediate bug fix.