Member formula question post-DSO

Summary:

After migration to DSO, account member formula not working

Content (required):

After DSO, a member formula to average values over a dynamic range of periods is no longer working. The formula is below, along with screenshots. Since the average is calculating only January, I'm thinking that the issue is with the @CURRMBR("Period") portion. It's like that piece of the formula isn't being recognized. Any thoughts on why this is happening?

Pre-DSO:

Post-DSO:

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

@AVGRANGE(SKIPNONE, "ACC_10000", @XRANGE("Jan", @CURRMBR("Period")));