🐛 Stange Stubby behaviour

[daemonserj]

Checklist

• I read the README
• I read the FAQ
• I searched the issues

Describe the issue
Strange behaviour using Stubby 0.3 on OpenWRT 19.07
While executing 3 times
getdns_query -d @127.0.0.1:5453 www.snbforums.com | grep address_data
I've got 3 different results: only ipv4 addresses, only ipv6 addresses and both.

root@OpenWrt:~# getdns_query -d @127.0.0.1:5453 www.snbforums.com | grep address_data
      "address_data": <bindata for 104.26.8.66>,
      "address_data": <bindata for 104.26.9.66>,
      "address_data": <bindata for 172.67.69.81>,
root@OpenWrt:~#
root@OpenWrt:~# getdns_query -d @127.0.0.1:5453 www.snbforums.com | grep address_data
      "address_data": <bindata for 2606:4700:20::681a:842>,
      "address_data": <bindata for 2606:4700:20::681a:942>,
      "address_data": <bindata for 2606:4700:20::ac43:4551>,
root@OpenWrt:~#
root@OpenWrt:~# getdns_query -d @127.0.0.1:5453 www.snbforums.com | grep address_data
      "address_data": <bindata for 2606:4700:20::681a:842>,
      "address_data": <bindata for 2606:4700:20::681a:942>,
      "address_data": <bindata for 2606:4700:20::ac43:4551>,
      "address_data": <bindata for 104.26.8.66>,
      "address_data": <bindata for 104.26.9.66>,
      "address_data": <bindata for 172.67.69.81>,

Replacing Stubby Blahdns config by default Cloudflare config solve the problem and results are the same: both ipv4+ipv6 addresses.
I am not sure that it is Blahdns issue but I can't explain why it's happened.

Here is Blahdns config:
stubby.zip

To Reproduce
Steps to reproduce the behavior:

1. Configure stubby 0.3
2. Exec in router's commandline:
   getdns_query -d @127.0.0.1:5453 www.snbforums.com | grep address_data

Expected behavior
Same DNS responce

• OS:
  OpenWRT 19.07

[zoonderkins]

Okay, let me check it.

[zoonderkins]

Ya, I can reproduce this issue. However, maybe you can add tls_port to resolve this issue or disable edns0
I need some time to figure out what cause this wired issue.

- address_data: 45.91.92.121
  tls_auth_name: "dot-ch.blahdns.com"
  tls_port: 853

Thanks