I have had this problem sometimes and I found that Phijama's weapon sheathescripts don't work properly all that time.
so I had to type StartScripts for all phijama's scripts, but it was too bothering.
Also, Hairdresser/Plastic Surgeon mod (SecondSeed's) made trouble sometimes.
When I finished the surgeon first, it's ok.
but when I do it again, classmenu window appears after deciding races.
Doing it third, birthmenu window appears, so when I click ok, my level returned to 1.
It's normal that when I activate enableracemenu, only racemenu should appear and fade, but unnecessary class and birth menu appears so it makes my character mess.
Is there any solution for this annoying problem?