Syslog with line Codec delimiter change fail the grok parser

[realgam3 (Tomer Zait)]

H all,
when using this configuration:

    input {
      syslog {
        port => 1337
        host => "0.0.0.0"
        codec => line {
          delimiter => "\n"
        }
      }
    }

with kv filter it fails with the tag "_grokparsefailure_sysloginput" although the default delimiter is "\n", I am trying to change the delimiter to "\r\n" but I can't even work with "\n" as a delimiter, it looks like it is trying to split lines by "\n" and also "\n", but when staying on default it is not spliting lines as "\n".

Error:

    {
              "facility" => 0,
        "facility_label" => "kernel",
            "@timestamp" => 2020-04-20T09:19:49.637Z,
              "severity" => 0,
        "severity_label" => "Emergency",
              "priority" => 0,
               "message" => "Accept-Encoding: gzip, deflate",
                  "tags" => [
            [0] "_grokparsefailure_sysloginput"
        ],
                  "host" => "1.3.3.7",
              "@version" => "1"
    }

Is there any other way to trim \r from the message (it causing me use a workaround on the kv filter) ?

Thanks.