All cases are possible with S{S|N}RIs (I am a doctor but I know a little regexp). Patients that took them for two months and never needed again and others that cannot stop them after 20y. The start, the stop and every restart of the drug needs an indication so it should be approached with the same care as any medical decision. It's not right to call it withdrawal. These drugs are not addictive like benzos or alcohol…
I absolutely had withdrawal when I needed to go off of it, and I can say with certainty that the mental effects of going off of it were not just the reappearance of the underlying mental health issues since there weren't any. My emotional regulation was in the toilet, I was extremely irritated, I'd cry constantly, I was horny as hell, etc.