You may have noticed that if you populate any multi-valued attribute with more than 30 values and apply group family rules to that property, the captured groups won't be created and the it will also slow down Active Roles server.
Active Roles is currently not well optimized to handle multi-valued attributes in group families, due to which processing large number of multi-valued attributes causes the server to hang.
This is a product defect (TF00586181).
This will be fixed on a future release of the product. If you require this immediately corrected, please contact support for a hotfix referencing the defect ID TF00586181.