Consul-template kv_get returns EOF

I’m getting this error: 5/21/2021 1:57:52 PM[ERR] (cli) kv.block(xxx): Get https://xxx?index=3683680&stale=&wait=60000ms: EOF when using consul-template v0.25.2 to mirror down file from Consul KV. The first connection works but subsequent calls fail and I believe the error comes from fetch() in kv_get.go. I wrote a small script to perform concurrent GET from Consul KV but there’s no such error. Could anyone help me on why I get this error? The only param I set is consul-ssl, consul-ssl-ca-cert, and consul-token. Thanks!