Here is the bug report Super User Idrissshatila wanted me to post in this channel: MAJOR bug as reported in thread: https://community.fabric.microsoft.com/t5/Service/RLS-and-USERELATIONSHIP-probl...
Anonymous : Thanks for investigating!
Any news if this change in the service is reverted anytime soon.
Especially our complex models rely heavily on USERELATIONSHIP() as it seems the most performant way, to handle down long (snowflake) paths.
Would TREATAS() from the RSL-Dim-Table to the other tables be a full replacement instead of all those (inactive) relationships?