Problem Transfer-Encoding give :ERR_INVALID_CHUNKED_ENCODING 200

Hi,

I want to send chunked m4s but I have the following error in my console on Chrome I get

FetchLoader.js:87 GET https://*****************.m4s net::ERR_INVALID_CHUNKED_ENCODING 200 (OK)

I attachment there is my conf and the headers information.

I hope you will understand my problem and help me find a solution, you can ask me for precision.

I use nginx 1.15.8 and chrome 73.0.3683.75 on windows 10