Particles in UE 4.6 not showing in viewport

Since I installed UE4.6, particles are no longer showing in my viewports. They do work in cascade and when I press play, but not in the viewport. How do I fix this? Is it a known bug? Thanks

Hey Madvoyer -

In the Viewport’s drop down, turn Realtime on (CTRL-R). This may have gotten turned off in the install.

Thank You

Eric Ketchum