There is a prob with arms and 2 handed weapons, I have it and I've read other discussions on it, but for me and the other ppl it was just visual.
My arms like to point down or to the sky sometimes or block my view field other times.
When you say you're unable to access your pipboy, get through doors or access the game menu, is that because your arms are blocking your view, your arms are too big to fit thru doorways or the hotkeys aren't working?
If you have a lot of mods, try disabling all of them at the same time to see if it's even mod related (most likely is). Here is my mod list in case we have anything in common that could be causing it:
Spoiler - CaravanPack
- Enhanced Blood
- Perk Every Level
- Further 3rd Person Cam
- Centered 3rd Person Cam
- More Shells
- Hidden Valley Bugfix