I7: Weird Understanding bug

Authoring Inform 7
1

[code]An uno is a kind of thing.
A dos is a kind of container.

Ownership relates one person to various things. The verb to own (he owns, they own, it is owning) implies the ownership relation.
The verb to be owned by implies the reversed ownership relation.

There is a room. Alpha is an uno. Beta is a dos. Alpha is owned by the player. Beta is owned by the player. Alpha and Beta are here.

Understand “your [a thing]” as a thing when the player owns the item described.[/code]

Examining “your (whatever)” sparks disambiguation here, which is quite annoying. I’ve looked about on the Mantis bug tracker, but haven’t found a bug to match it. Is this a known bug?

2

Correct solution is to use:

Understand "your" as a thing when the player owns the item described.
3

Thanks, that was it. I even looked it up in the manual, but still got it wrong.