Hello

The solution on this problem is to change line 213 in index.php from:

header('Cache-Control: public, max-age=300');

to:

header('Cache-Control: private, no-cache="set-cookie"');

Because of your and magmas reports, that your solution works with IE (what's with Edge?), I will test your solution in other browsers. There it has to work too.

Tschö, Auge