Did the Mastery Rank 30 test, every single time I killed one of the target enemies at the end of a wave, the game would effectively freeze for several seconds. It seemed to occur regardless of weapon used. It does not occur when killing the arbitration drones. The freezing is bad enough that several times I almost died because of it.
Just went to Simaris to try it again after a fresh reboot, and issue still occurs. I have grabbed the EE.log and EE.cfg from the run if thats needed.
EDIT: EE.log (1 of 2) EE.log (2 of 2) EE.cfg