HTTP request slow

[nag95]

Hi,

For the past two days, all requests to oauth2.googleapis.com or project.firebaseio.com have been very slow. I enabled debug with the withEnabledDebug function and I can't find any error except the connection to ipv6 before ipv4:

• About to connect() to oauth2.googleapis.com port 443 (#0)
  --
    | * Trying 2a00:1450:4007:80b::200a...
    | * No route to host
    | * Trying 172.217.18.202...
    | * Connected to oauth2.googleapis.com (172.217.18.202) port 443 (#0)
    | * Initializing NSS with certpath: sql:/etc/pki/nssdb
    | * CAfile: /etc/pki/tls/certs/ca-bundle.crt
    | CApath: none
    | * SSL connection using TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
    | * Server certificate:
    | * subject: CN=upload.video.google.com,O=Google LLC,L=Mountain View,ST=California,C=US
    | * start date: Jan 19 08:02:36 2021 GMT
    | * expire date: Apr 13 08:02:35 2021 GMT
    | * common name: upload.video.google.com
    | * issuer: CN=GTS CA 1O1,O=Google Trust Services,C=US
    | > POST /token HTTP/1.1
    | User-Agent: GuzzleHttp/6.5.5 curl/7.29.0 PHP/7.2.34
    | Host: oauth2.googleapis.com
    | Cache-Control: no-store
    | Content-Type: application/x-www-form-urlencoded
    | Content-Length: 1199
    |  
    | * upload completely sent off: 1199 out of 1199 bytes
    | < HTTP/1.1 200 OK
    | < Content-Type: application/json; charset=UTF-8
    | < Vary: X-Origin
    | < Vary: Referer
    | < Date: Sun, 31 Jan 2021 16:24:25 GMT
    | < Server: scaffolding on HTTPServer2
    | < Cache-Control: private
    | < X-XSS-Protection: 0
    | < X-Frame-Options: SAMEORIGIN
    | < X-Content-Type-Options: nosniff
    | < Alt-Svc: h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
    | < Accept-Ranges: none
    | < Vary: Origin,Accept-Encoding
    | < Transfer-Encoding: chunked
    | <
    | * Connection #0 to host oauth2.googleapis.com left intact

Thanks for your help !