Transaction not completed but trans_status NOT false

I would check with your hosting provider and see if they have made any changes to the server

Like PHP, updated MySQL etc;

I host the code on private servers and nothing has changed since a hosting change two years ago. But still, is there a case or a scenario that would lead to a rollback AND a status set to TRUE ?
I've a single and unique transaction. Maybe if the same request is called  simultaneously...I'm giving up