New
#2210
I also wonder that, it is the same thing that happens with this fix made in that same build (18234):
That fix has not yet been back ported to O18U, there are several complaints, both here and in Reddit, about that bug.
Windows 10 October 2018 Update rollout now paused
Right click -> New context menu really slow
But there is still time for them to add those and more fixes to O18U.