VFX are not reinit immediatly when changing properties in asset inspector

Steps to reproduce:

1. Create a new VFX asset and instantiate in scene
2. Select the VFX asset in project browser
3. Change the instancing mode and culling flags in inspector

Actual results: 

VFX instances are not always reinitialized correctly. And require manual user action to tick the editor update

Expected results: 

VFX instances are always correctly reinitialized

Reproducible with versions: 6002.0a7

Not reproducible with versions: not tested

Can’t test with versions: 

Tested on (OS): windows editor

Notes:

• This is most likely and issue with culling state and VFX reinit. The auto editor update is not triggered for some reason
• Notice that if you create another VFX asset + instance in scene, redoing the repro steps won't show the issue anymore because this instance will force the editor update
• Marked as not a regression but could be one