Landscape Freezes in Editor while painting textures and sculpting terrain

Development World Creation
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1

While working in the terrain anytime I paint a texture on the landscape and release the mouse the editor freezes for about 10 seconds where everything is unresponsive and then it displays the results. It also does the same thing when I try to sculpt the terrain. I have tried turning off shadow casting lights, every other mesh in the scene except for the terrain and it still does this. It makes it impossible to work because you cannot see interactively what the results of what you are doing will be until it is done freezing.
I have a pretty good machine here is what I am running:

Intel(R) Core ™ i7-4960X CPU @ 3.60GHz
Installed Memory: 32 GB
64-bit operating system
Graphics Card: NVIDIA GeForce GTX 970

2

Same for me using 4.26!

I have a I9 14 core with 2 2080 TIs.
It worked fine until the Update to 4.26!

3

Same for me using 4.26!

I have a I9 14 core with 2 2080 TIs.
It worked fine until the Update to 4.26!
It is even doing it in WIRE FRAME Mode.

4

Still an issue in 5.1.