I had in my form a 'Button Free'.
It was not redirecting to my form though.
I was really confused as other 'Button Free''s were.
I found the issue by looking in the DB and compared the values stored.
bool7 = 0 or 1
This value makes the attribute
type="button"  or type="submit" 
I must have used the field as something else before changing to field type 'Button Free' or something like that.
My working 'Button Free' fields had
bool7 = 0
My NOT working field had
bool7 = 1
There you go.