Selected Resources become unchecked prior to Level
We have had multiple users report that when they try to Level Resources, some or all of the Resources which had been chosen under Select Resources become unchecked. This seems to happen mainly when there are multiple schedules opened. It doesn't happen every time but occasionally. This occurred when we had Primavera P6 version 16.2 and is also happening with our current version 19.12. No error code is provided. What is causing this?