Stock "P_AssaultRifle_AMmo" and "P_Health" pickup particles from the Shooter Game Pack cause the editor viewport to stutter and hang repeatedly

When placing "P_AssaultRifle_AMmo" and "P_Health" pickups into a level there seems to be some stuttering in 4.19 projects.

1. Create a new 4.19 project with the shooter game pack
2. Open up an empty level and begin placing some "P_AssaultRifle_AMmo" and "P_Health" pickups
3. Once 50 or so of the pickups have been placed take a look at the FPS when using PIE
4. Also using stat raw can show the stutters in FPS

Results: FPS stutters frequently in 4.19 projects while 4.18 is fine

Expected: The 4.19 projects performance should be similar to the 4.18 project