Treegateway add '/ ' to GET request trigerring 404 not found error

[tfoutrein]

When i'm trying to use a simple API like this

name: chappie-tts
version: 0.1.0
path: chappie/tts
proxy:
    target:
        host: 'https://gateway_url/ms_chappie/api/readings'

there is a pb when calling chappie/tts?text=bonjour&audio_format=mp3 the service receive the request like this :
https://gateway_url/ms_chappie/api/readings/?text=bonjour&audio_format=mp3

i think it's an issue, or perhaps if i've misunderstood the api

Thank you in advance