How to change Atom Echo wake word?

Is the Wake Word dropdown here supposed to be enabled?

Moreover, if I try to change the engine location to Home Assistant, no matter what wake word I choose in the Voice Assistant configuration, it won’t respond. I recently updated HA to some February OS and Core versions, previously I had January versions and HA used to detect the wake word when I first started a conversation, but then I was not able to continue the conversation - it wouldn’t detect the wake word anymore for at least 1 minute. Now it never detects it at all.

I have HA installed in a VM.

The default, on device wake word (OK Nabu) works.