@qq1i
Outdated or broken mods will cause the T posing so the first thing you should do is to move your mods folder to your desktop, delete the localthumbcache file, start a new game and play for a while to see if the problem still happens. If it doesn't, then there is something in your mods folder causing it so you will need to test your mods one by one and then together to see if you can find the one that causes it. Once you do find it, you'll need to either update it if you can or remove it. CC rarely causes the T pose issue so you can probably save test that last, but you should test all your CC just to make sure that you don't have a bad file or two.
Hope this helps.