What happens if your handling editor leaves the editorial board?
I sincerely hope there was more communication than just 'after more than one year'. It sounds like there are some organizational changes within the journal that may be working against you.  I've had that situation too, and it led to unreasonable delays in review.  I suggest you go straight to someone on the editorial board and politely ask for some relief. Problems within the journal editorship should not impact you so negatively, which it clearly has.  In my case, this worked, and the review was immediately reassigned to a new action editor and fast-tracked. Don't be afraid to speak up, just state the facts and be polite. The main point is to ask the journal what they think the best course of action is.