Aliases for Google Assistant do not work reliably - any gotchas?

Configuration
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Doing a bit of testing with aliases and I find that they seem quite buggy.
E.g. I have two switches.

  • switch one has two aliases: “Shower Switch One” and “Shower Switch 1”
  • switch two has two aliases: “Shower Switch Two” and “Shower Switch 2”

If I say “hey google, turn on shower switch two” then the FIRST switch is turned on.
If I un-expose the first switch to Google Assistant, then it works fine.

Does anyone have experience with aliases? Any gotchas? I’ll play with them more. They seem like such a cool feature but for some reason are kind of flaky for me.