FieldType/FieldComment return "?" in stored calcs on server-hosted files

Issue report by Dillik

Product

FileMaker Pro

Version

FMPA 12v4

Operating system version

OS X 10.7.5

Description of the issue

The functions FieldType and FieldComment return a question mark rather than their intended results, but only on files hosted by FileMaker Server, and only when the calculation is stored. Checking "Do not store calculation results" in the calculation storage options makes the function calculate normally. This does not occur for me on local files.

(FYI, all of the server-hosted files I'm able to test on currently have spaces in their filenames, if that's relevant.)