18.06.1 - ddns luci problem

openwrt version: 18.06.1
target: ar71xx ---> generic ---> archer-c7-v2


I've installed luci-app-ddns and ddns-scripts_no-ip_com packages and I've disabled the ddns service from startup (initscripts). In the luci status page, some of the html code is "spitted" instead show the status of the service correctly. When the service is enabled everything is ok.

image that shows the problem:

Please how to fix this?