After “compiling” level blueprint first simulation runs without “flow visualisation”. After that everything is fine.
UE 4.10, Windows 8.1 64bit.
Reproduce:
- Open level Blueprint.
- Add “Print String” Node and connect it to Event BeginPlay.
- Click “Compile”.
- Click “Play”.
- No flow simulation.
- Click “Stop”.
- Click “Play”.
- There is flow simulation.