Everytime you change modes in UEFN, editor freezes (100% repro)

Summary

This happens on all my projects and its breaking my flow. Everytime I change the mode in UEFN (like landscape, or modelling), the editor would freeze for half a second after a few seconds.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

Open a project
Change modes

Expected Result

nothing happens

Observed Result

editor freezes for 0.5 secs after a few secs of changing, move camera in viewport constantly to see

Platform(s)

pc