.key() function shown as an error

There is a function .key(integer) for maps which selects a specific key from the map. The working code is currently shown as an error (in textmate scope invalid.illegal.leo) in AdoScript even though it is actually correct:

Weirdly in FUNCTION definitions it has a different scope entity.name.function.leo:

Its actual textmate scope should be: support.function.sequence.leo