Sculpting in 2.83 doesn't sculpt every verticies https://i.imgur.com/TeSWnbT.gifv
This is virtually my issue. Every time I want to sculpt something, its not pulling every verticies it needs to pull when scultping. Sometimes, not always, but pretty frequently, I do CTRL+Z to go back and it crashes my Blender most of the time.
I Incorporated everything in the gif so hopefully someone can see what is wrong, I am using default settings as well.. Had a completely fresh reinstall of blender and the one I used on my now dead HDD is blender 2.81. The only addons I have added were CATS and some atlasing tool for CATS, which is a program to help quicken the process to port certain models to VRChat, this is helpful in a lot of ways to quickly pose the model and such. As well as merge different armature. Shouldn't touch anything sculpting related.
I am... genuinely curious as to what is going on here. I'm just scuplting and some mesh/Verticies aren't getting dragged when they should be. I watched a video and they said to try and apply scale. I did that, didn't help much at all. I'm at a loss right now.
see if there is any auto masking is active. if not then recalculate your normals.

6/19/2020 edit: it's a bug with triangle faces in blender 2.83 LTS. your workaround is to select your model go to edit mode and press f3 and search for tris to quads then try smooth sculpting. workaround worked on my side.