Automapping: "Other" doesn't behave as described/expected

[eishiya]

The "Other" automapping rule tile doesn't seem to behave as described in the documentation:

• Unless the rule contains Empty inputs elsewhere, Other matches Empty.
• Other seems to be overridden by the Empty tile if it's present
• When combined with explicit tiles, it seems to break the rule entirely, never matching even when either the explicit tile or the Other should match

I am using 1.9.1, but AFAIK 1.9.2 doesn't have any changes to Other tiles and probably works the same.

For example, this rule looks for a grass tile surrounded by Empty or Other tiles, and outputs a small dark green tile on another layer: I expect this rule to match all of these scenarios: However, the rule only matches the tile that's surrounded by empty tiles:

If I remove the Empty input tiles so that only Other tiles are left, then the rule matches all three scenarios, which is also unexpected behaviour, as the documentation says Other only matches non-empty tiles.

If I make a rule that looks for a grass tile surrounded by cliffs or Other, then the rule doesn't match any of the above scenarios or even the extra scenario where the grass tile is surrounded by yet another tile, even though I'd expect it to match the 2nd and 4th scenarios, or at least the 4th scenario: