motion warning trigger hardware in domoticz by mqtt

[ariekanarie2005]

I try to use the motion warning from an outdoor yi 1080p camera to trigger hardware in domoticz.
I edit the Topics Prefix to "domoticz"
i edit the Topic Suffix to "in"
when i trigger motion i see with mqtt explorer a message under domoticz/in
so far so good,

But after I edit motion start message to { "idx" :45 , "nvalue" : 1} and save and reboot text in field has changed to
%7B+%22idx%22+%3A45+%2C+%22nvalue%22+%3A+1%7D

Is there an solution to direct trigger hardware in domoticz from yi-hack v4 with out using node red as translator?
Is this an issue that have to been solved?

I hope someone can help me with this issue.