Question about forwarders option access

[Techs-yama]

Hi, bind-users All.

I have question about "global forwarders option" in named.conf,

For example,

forwarders {
      1.1.1.1;
      2.2.2.2;
      };

I tried packet capture in this server on dig query,
However, I looked like destination server access is randomized.

looked like....
1.1.1.1 -> 2.2.2.2 -> 1.1.1.1 -> 1,1,1,1 -> 1.1.1.1

Does not this configuration parameter [server address] is sequential access?
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