I downloaded the latest snapshot version, 1.14.4pre-2.

And as I got in, I created the world to test stuff out if there are any bugs that are still there and this is where it happens as it was happening. As it was getting to 100% it just stopped or was still rendering and processing the world generation, but I made it a flat redstone world. Then I waited for several minutes (15-30 Min.) and it was still stuck on 100% and nothing changed but I gave it a another few minutes (30-50 Min.), same result still stuck on 100%.

I didn't get a Minecraft.Exe was stopped working and weirdly I couldn't Alt+F4 to manually close it. It was genuinely stuck processing the world load screen.