Good question. I haven't read threads on DMZ gyno so far, but there are a lot of threads so I definitely believe you lol. If they got it after PCT, it would be what some call "rebound" gyno. You can start the AI in week 3 of PCT and run for 3-4 weeks at low low dose but don't use it in weeks 1-3...
While on the SERM you are protected from estrogen and you do not want to suppress it, the whole point of the serm is to reach homeostasis.. What can actually lead to this "rebound" gyno is blocking estrogen conversion while in PCT. It makes no since because the point of a serm is to help your body reach homeostasis and when you're on an AI, you are causing very low estrogen levels so then you stop the serm and the AI after PCT, your estrogen comes back like a bat out of hell and you're unprotected from the side effects..
In my opinion with non-aromatizing compounds, an AI should only be kept as back up and only used if something goes wrong like a bunk serm or you start to feel a creepy crawly feeling behind your nip.. Run it at PCT your looking at rebound and run it during cycle you are drying yourself out too much, killing your libido and even hindering gains (estrogen helps gains).