Problems Configuration Enable PageSpeed and HTTP2 with NGINX ISPConfig 3.1.13

My ISPConfig environment (all 3.1.13):

1 x Server Control Panel Ubuntu 18.04
2 x Web Server (1 x NGINX, 1 x APACHE) Ubuntu 18.04
2 x DB Server Ubuntu 18.04
2 x DNS server (master mirror) Debian Stretch
1 x Mail Server CentOS 7.5

As a reseller or client, I have configured a website for a web server (NGINX). Then I activate as Admin PageSpeed and SPDY/HTTP2 for the corresponding website.
As far as everything is working correctly, the site contains the PageSpeed changes and isavailable with the HTTP2 protocol. However, if I am a reseller or client of the web domain through the tabs of ISPConfig Dashboard "Domain" or "SSL", there are no settings for PageSpeed or HTTP/2, that's no problem either. But if I have the Tab "Domain" or "SSL" leave, the changes are immediately taken over accordingly. Since there are no settings for PageSpeed and HTTP/2 at the server or client the settings made by the admin are removed. Now I thought to solve the problem by going through System->Main Config->Diverses activating "Discard changes Tab switch", but then the search does nor works for DNS->Zone->Entries, you can no longer search the contents of the search fields change (this is actually an additional problem).

Is there a way get access to the checkbox for Pagespeed and HTTP2 reseller and client So that they are not accidentally and unnoticed (because they are not there) be deleted by the reseller/client?

 

i think, both options should be visible for the client if the settings are enabled for the server. can you add this to the bug-tracker?