I have read this is a symptom of menopause. I found that reassuring as I had a frightening incident. I came out of the supermarket and haven't a clue where I was. The sensible voice in my head said don't panic, but drive to the car park over the road and sort your self out. Fortunately things fell into place and I realised where I was. I did start thinking was this an early sign of dementia, but am now reassured.