Sometimes when I swing my sword or cast a spell, my height (in 1st person) increased .. I have to look down to peoples - and peoples had to look up to me .. however, when I move, my height revert back to normal.. until I stopped again.
Problem sometimes go away when I fail casting a spell -I used fizzle mod- (or simply played a staggered animation) <- this mod wasnt the culprit. That I can be sure.
I did have a lot of animation replacer (those without esp) so I thought I should asked if anyone actually know the mod that causing this.