No flow visualisation in level blueprint in first simulation after compilation

After “compiling” level blueprint first simulation runs without “flow visualisation”. After that everything is fine.

UE 4.10, Windows 8.1 64bit.

Reproduce:

  1. Open level Blueprint.
  2. Add “Print String” Node and connect it to Event BeginPlay.
  3. Click “Compile”.
  4. Click “Play”.
  5. No flow simulation.
  6. Click “Stop”.
  7. Click “Play”.
  8. There is flow simulation.