Can't use with cloudflared tunnel: stream error: stream ID 3; PROTOCOL_ERROR

The websocket connection works when I'm testing on my machine with localhost but for some reason, when I'm using it deployed with [cloudflared](https://github.com/cloudflare/cloudflared) the websocket opens but closes immediately with an 1006 error code.

If I test with the "simple websocket client" Chrome extension, I get the same problem. But if I try a [simple nodejs websocket server](https://github.com/websockets/ws#simple-server), it works, so I'm guessing maybe the problem is with tide-websockets.

Also, it seems that my backend is sending data to the websocket, but I don't get it on the browser side.

Don't hesitate if you want me to test anything or provide a cloudflared config file example.

tide-websockets: 0.4.0
tungstenite: 0.13
async-tungstenite: 0.13.1

**cloudflared log**
```
2021-07-10T08:43:40Z DBG CF-RAY: 66c8817b4ad719f3-EWR GET /as_endpoint HTTP/2.0
2021-07-10T08:43:40Z DBG Inbound request CF-RAY=66c8817b4ad719f3-EWR Header="map[Accept-Encoding:[gzip] Accept-Language:[fr-CA,fr;q=0.9,en-CA;q=0.8,en;q=0.7,fr-FR;q=0.6,en-US;q=0.5] Cache-Control:[no-cache] Cdn-Loop:[cloudflare] Cf-Connecting-Ip:[142.119.3.135] Cf-Ipcountry:[CA] Cf-Ray:[66c8817b4ad719f3-EWR] Cf-Visitor:[{\"scheme\":\"https\"}] Cf-Warp-Tag-Id:[34d63501-58fa-42e7-80b2-f0d2d9d6641a] Origin:[chrome-extension://pfdhoblngboilpfeibdedpjgfnlcodoo] Pragma:[no-cache] Sec-Websocket-Extensions:[permessage-deflate; client_max_window_bits] Sec-Websocket-Key:[v3qtg+YnhA9QmPForWelsA==] Sec-Websocket-Version:[13] User-Agent:[Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36] X-Forwarded-For:[142.119.3.135] X-Forwarded-Proto:[https]]" host=my_hostname path=/as_endpoint rule=0
2021-07-10T08:43:40Z DBG CF-RAY: 66c8817b4ad719f3-EWR Request Content length unknown
2021-07-10T08:43:40Z DBG origin to tunnel copy: read tcp 127.0.0.1:42228->127.0.0.1:8378: use of closed network connection
2021-07-10T08:43:40Z DBG CF-RAY: 66c8817b4ad719f3-EWR Status: 101 Switching Protocols served by ingress 0
2021-07-10T08:43:40Z DBG CF-RAY: 66c8817b4ad719f3-EWR Response Headers map[Connection:[Upgrade] Content-Length:[0] Date:[Sat, 10 Jul 2021 08:43:40 GMT] Sec-Websocket-Accept:[WeH80atTrSGYEFBFOPqvTmC+J8I=] Sec-Websocket-Version:[13] Upgrade:[websocket]]
2021-07-10T08:43:40Z DBG CF-RAY: 66c8817b4ad719f3-EWR Response content length 0
2021-07-10T08:43:40Z DBG tunnel to origin copy: stream error: stream ID 3; PROTOCOL_ERROR
```

**tcpdump**
```
✦ ❯ sudo tcpdump -A -i any port 8378
tcpdump: data link type LINUX_SLL2
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on any, link-type LINUX_SLL2 (Linux cooked v2), snapshot length 262144 bytes
08:43:40.797218 lo In IP localhost.42228 > localhost.cruise-config: Flags [S], seq 552307204, win 65495, options [mss 65495,sackOK,TS val 756630405 ecr 0,nop,wscale 7], length 0
E.. localhost.42228: Flags [S.], seq 4166726621, ack 552307205, win 65483, options [mss 65495,sackOK,TS val 756630405 ecr 756630405,nop,wscale 7], length 0
E..<..@.@.<......... ....[3. ........0.........
-.C.-.C.....
08:43:40.797255 lo In IP localhost.42228 > localhost.cruise-config: Flags [.], ack 1, win 512, options [nop,nop,TS val 756630405 ecr 756630405], length 0
E..4/4@.@............. . ....[3......(.....
-.C.-.C.
08:43:40.817118 lo In IP localhost.42228 > localhost.cruise-config: Flags [P.], seq 1:816, ack 1, win 512, options [nop,nop,TS val 756630425 ecr 756630405], length 815
E..c/5@.@.
^.......... . ....[3......X.....
-.C.-.C.GET /as_endpoint HTTP/1.1
Host: my_hostname
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36
Accept-Encoding: gzip
Accept-Language: fr-CA,fr;q=0.9,en-CA;q=0.8,en;q=0.7,fr-FR;q=0.6,en-US;q=0.5
Cache-Control: no-cache
Cdn-Loop: cloudflare
Cf-Connecting-Ip: my_ip
Cf-Ipcountry: CA
Cf-Ray: 66c8817b4ad719f3-EWR
Cf-Visitor: {"scheme":"https"}
Cf-Warp-Tag-Id: 34d63501-58fa-42e7-80b2-f0d2d9d6641a
Connection: Upgrade
Origin: chrome-extension://pfdhoblngboilpfeibdedpjgfnlcodoo
Pragma: no-cache
Sec-Websocket-Extensions: permessage-deflate; client_max_window_bits
Sec-Websocket-Key: v3qtg+YnhA9QmPForWelsA==
Sec-Websocket-Version: 13
Upgrade: websocket
X-Forwarded-For: my_ip
X-Forwarded-Proto: https

08:43:40.817134 lo In IP localhost.cruise-config > localhost.42228: Flags [.], ack 816, win 506, options [nop,nop,TS val 756630425 ecr 756630425], length 0
E..4.q@.@.'Q........ ....[3. ..4.....(.....
-.C.-.C.
08:43:40.840487 lo In IP localhost.cruise-config > localhost.42228: Flags [P.], seq 1:213, ack 816, win 512, options [nop,nop,TS val 756630448 ecr 756630425], length 212
E....r@.@.&|........ ....[3. ..4...........
-.C.-.C.HTTP/1.1 101 Switching Protocols
connection: Upgrade
content-length: 0
date: Sat, 10 Jul 2021 08:43:40 GMT
sec-websocket-accept: WeH80atTrSGYEFBFOPqvTmC+J8I=
sec-websocket-version: 13
upgrade: websocket

08:43:40.840520 lo In IP localhost.42228 > localhost.cruise-config: Flags [.], ack 213, win 511, options [nop,nop,TS val 756630448 ecr 756630448], length 0
E..4/6@.@............. . ..4.[4......(.....
-.C.-.C.
08:43:40.885283 lo In IP localhost.cruise-config > localhost.42228: Flags [P.], seq 213:229, ack 816, win 512, options [nop,nop,TS val 756630493 ecr 756630448], length 16
E..D.s@.@.'?........ ....[4. ..4.....8.....
-.C.-.C...{"Servers":[]}
08:43:40.885336 lo In IP localhost.42228 > localhost.cruise-config: Flags [.], ack 229, win 511, options [nop,nop,TS val 756630493 ecr 756630493], length 0
E..4/7@.@............. . ..4.[4......(.....
-.C.-.C.
08:43:40.886539 lo In IP localhost.cruise-config > localhost.42228: Flags [P.], seq 229:251, ack 816, win 512, options [nop,nop,TS val 756630494 ecr 756630493], length 22
E..J.t@.@.'8........ ....[4. ..4.....>.....
-.C.-.C...{"NbPlayersInit":[]}
08:43:40.886551 lo In IP localhost.42228 > localhost.cruise-config: Flags [.], ack 251, win 511, options [nop,nop,TS val 756630494 ecr 756630494], length 0
E..4/8@.@............. . ..4.[4......(.....
-.C.-.C.
08:43:40.889282 lo In IP localhost.42228 > localhost.cruise-config: Flags [F.], seq 816, ack 251, win 512, options [nop,nop,TS val 756630497 ecr 756630494], length 0
E..4/9@.@............. . ..4.[4......(.....
-.C.-.C.
08:43:40.930087 lo In IP localhost.cruise-config > localhost.42228: Flags [.], ack 817, win 512, options [nop,nop,TS val 756630538 ecr 756630497], length 0
E..4.u@.@.'M........ ....[4. ..5.....(.....
-.D
-.C.

^C
13 packets captured
61 packets received by filter
0 packets dropped by kernel
```

**my backend log**
```
jui 10 08:43:40 vps tide-ws-back-start[1448913]: {"level":30,"time":1625906620840,"msg":"--> Response sent","method":GET,"path":/as_endpoint,"status":101 - Switching Protocols,"duration":4.836325ms}
jui 10 08:43:40 vps tide-ws-back-start[1448913]: new ws
[...]
jui 10 08:43:40 vps tide-ws-back-start[1448913]: {"level":30,"time":1625906620882,"msg":"send ws: Servers([])"}
jui 10 08:43:40 vps tide-ws-back-start[1448913]: {"level":30,"time":1625906620885,"msg":"send ws: NbPlayersInit([])"}
```