Tell HN: Whenever I search Heads or Tails on Google, I get tails the first time

I don't think this is random luck

Whenever I search heads or tails I get tails if I haven't searched heads or tails in the last hour or so.

1 or 2 month ago it was heads all the time

Does anyone know what could be causing that?

Could it be because of the /dev/random values in a VM image that they always revert back to?

it's nothing important really, but I'm curious