Ah, thanks! So I’m not losing my marbles then 
The listing hint is useful as well, thank you.
I thought it was pilot error on my part but it looks like it’s is a long-standing issue:
- lambda expression does not handle “.” operator for dictionary
- Using Dict.Key inside of lambda expression inside of maplist causes compiler to build wrong code
In my case the lambda is more complex than a simple dict value selection, so it is probably better off in a separate predicate anyway.