Unreal Engine 4.8 Preview

Dear Epic team,
I am facing in 4.8 preview a Full Editor freeze for >30 sec while using bsp.
please find below link to bug report i submitted.
https://answers.unrealengine/questions/238541/full-editor-freeze-for-30-sec-while-using-bsp.html

Please have a look as level designing becomes a pain due to this issue.

Thank you in advance for your attention and help

I hope to read you soon

Cheers