Property expansions failing in Maven, but working in UI

I have 2 JDBC steps that contain assertions with a property expansion. The properties are expanded correctly in the GUI, but when I run the project on the Maven plugin, they evaluate to '[]'. I.e. they are not being expanded, and as a result my build fails. I have at least 1,000 property expansions all over my project referencing properties at all levels (Project, Suite, Case...), but these are the only 2 that are failing, and I have no idea why. I've tried changing the property locations from Test Case to Test Suite, tried changing the assertion from XPath to Message Content, and I cannot figure out why this is happening for just these 2.

This is not the first time I've had a situation like this, where something runs correctly in the UI, but fails in Maven for reasons unknown. Anyone experienced this issue and know how to resolve it?

Thanks, David