Azure Container App Dapr POST request empty body

Question

I'm having two Azure Container App services, both are Django with uWSGI. The first service (called Service A) has a POST request path /call-b/ which when called will forward the same JSON body to second service (Service B) at path /process/. The issue is that when I call the service B using Postman or service B's Container App, it works but when calling service B via Dapr, service B receives empty body.