Minimal openresty config streaming HTTP V2 issue

default.conf

server {
    listen       443 ssl http2;
    error_log           stderr warn;
    ssl_certificate /etc/certs/nginx-selfsigned.crt;
    ssl_certificate_key /etc/certs/nginx-selfsigned.key;

    server_name  localhost;

    location / {
      access_by_lua_block {
        ngx.header['content-length'] = "104857600"

        local chunk = string.rep("x", 1024 * 8)
        local total = 12800
        for i = 1, total do
          local ok, err
          if (i % 1000) == 0 then
            ngx.log(ngx.WARN, 'STILL GOING ', i / total)
          end

          ok, err = ngx.print(chunk)
          if not ok or err then
            ngx.log(ngx.WARN, "ERROR PRINTING: ", err)
            break
          end

          -- This never blocks when using HTTP2
          ok, err = ngx.flush(true)
          if not ok or err then
            ngx.log(ngx.WARN, "ERROR FLUSHING: ", err)
            break
          end
        end
        ngx.log(ngx.WARN, 'EXITING')
      }
    }
}