Passing parameters to Large Text properties seems to be broken

Summary: See details.

The documentation on function parameters says, (Occasionally useful: the same is true of Text and Large Text Properties -- you can "call" these with parameters, and use those parameters in QL Expressions inside the text.)

This would be really handy, but it doesn't seem to be working; if I, eg, invoke

then I just get the string expanded once for each Thing in the received context.

I can work around this by deleting the Property and re-creating it as a Function, but doing that as a refactor when the Property is already used in many locations is a pain, and Large Text may simply be more accurate than Function: the primary point of the Property is to evaluate to a bunch of Text meant for direct display.