Hello! I know about smoke collision issue, sorry about that, however it is really easy to fix:
Just cut all these nodes in Construction Script of Smoke Grenade blueprint:
[ATTACH=JSON]{“data-align”:“none”,“data-size”:“full”,“data-tempid”:“temp_152094_1542255585204_223”,“title”:“constScript.JPG”}[/ATTACH]
https://forums.unrealengine.com/core/image/gif;base64
And then paste all of them to Event Begin Play:
[ATTACH=JSON]{“data-align”:“none”,“data-size”:“full”,“data-tempid”:“temp_152095_1542255609896_25”,“title”:“pasteHere.JPG”}[/ATTACH]
https://forums.unrealengine.com/core/image/gif;base64
After this smoke should collide properly on client and server. Let me know if there will be still a problem with collision after this fix.
Regarding to flash grenades issue… Well, it is really weird because for me it just works out of box. Did you change something in Flash Grenade blueprint?
Also I’ll fix these small bugs like that one with none error when playing sound at location. Thanks for the tip!