I just did as what you wrote but unfortunately I ended up with bootloop. And I fixed it by reflashing PXM using twrp. May I didn't catch your idea, please show me the steps clearly once again, if you don't mind.
Same issue with me too.
Sent from my s8+
---------- Post added at 11:33 PM ---------- Previous post was at 11:30 PM ----------
bootloop after installing on my s8+ may 1, 2018 patch.