WaitForChild and FindFirstChild with a Number Name Instance comes out wrong

Bug Reports Studio Bugs
#1

Bug Description

When I use WaitForChild or FindFirstChild on a NumberName Instance it has %2[InstanceName]

Re-create

You can create an Instance (ex: Part, Model, Hint, Gui, etc) with a number name.

And use WaitForChild or FindFirstChild on that Instance.
Then click enter or tab on the Instance name.

Then you will see this %2[InstanceName]