Didn't we used to be able to type "entity:node/####" in a typeahead field? When using any Drupal 8 link field to dynamically link to a node, I start typing the title and the typeahead function starts providing options to chose from. These are Drupal field types such as Link or Entity Reference.

For various reasons, sometimes the correct title doesn't appear and I can't choose it using what's in the typeahead choices. In those cases, I always just used:

entity:node/[node_id_number]


I'm trying to do that now, and Drupal isn't recognizing it as a valid entity. I keep getting the error message:

There are no entities matching "entity:node/6491".

I've tried typing it every which way I could think of, figuring I just forgot the correct syntax. I tried:

/entity:/node/6491
/entity:node/6491
entity:/node/6491
/entity: node/6491


and more.

Can anyone tell me what I'm doing wrong? Or was it all just a fever dream and I was never able to fill in a typeahead link field using 'entity'?
Ooooooooookay.

The entity:node/[node_id_number] only works in a Drupal link field. It does NOT work in a Drupal entity reference field. 

Although both of those fields feature the typeahead function and link to other nodes, you cannot use  entity:node/[node_id_number] to fill in an entity reference typeahead field.

Thanks @Clive for making me clarify my field types and start down the path to seeing my wrong assumption.