I'm having an issue where a particular set of relationships is deleted every time the model is refreshed. The "update relationships on refresh" option is off. There is no amiguity in the relationship (1:N). After refresh is completed, I can recreate the relationships without any issues. The deleted relationships are bidirectional crossfilters. I am using version 2.67.5404.801 (64x).
This issue is a pain because the model is large and recreating all of the severed relationships takes ~10 minutes every time. Unfortunately, I cannot share the model itself because of proprietary data issues.