There appears to be multiple problems with Memory Statistics.
Upon immediately joining a place, the Memory Stat (implied total; nesting CoreMemory) is somehow less than CoreMemory. Either these measurements are wrong, or they are asynchronous. Which is it?
Only after around a minute will this discrepancy sort out for the map Default Baseplate.
Furthermore, in a live game of mine, Memory is only 700MB when PlaceMemory is 500MB and CoreMemory is 300MB, and unlike on the BasePlate this does not resolve.
Untracked memory relaxes at a perfect zero, and then, for no discernible reason suddenly is allocated some 80-88MB on a flux? On a Baseplate.
I get the impression to disregard this altogether, and only pay attention to PlaceMemory. Am I wrong to do so?