Search result is the same as the number of topic per page

[rich20]

Describe the bug
https://www.kunena.org/forum/36-German/152869-suchergebnis-im-forum-beschnitten-nicht-navigierbar

To Reproduce
Enter the search keyword Joomla at kunena.org

Expected behavior
All search results

Actual result
You get only 30 results (the same number as topics per page)
You get always the same number of search result as is setting Topics per page

Screenshots
If applicable, add screenshots to help explain your problem.

System information (please complete the following information)

Joomla version: 3.8.8
Kunena version: 5.1.2-DEV
Php version:
Database version:

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[sshcli]

Duplicated. See #5863

[rich20]

Ah.. sorry, I close this here