Issue with the mobile version and sub-categories

Hi all

Like you can see into my screenshot, the sub-categories break the window on mobile version

Can you help me ?

Kunena Version : 5.1.9
KBento version : 5.2.6
Joomla version : 3.9.3

My Forum : nhlqc.ca/index.php/bureau-dg

login : demo
PW : Demo1

Thanks

Hi,
Thank you about bug report. We are upgrading our templates to compatible with Kunena latest version 5.1.9. We will improve code to fix this issue in the next version.

Best regards,