Yeah that firmware was installed with last official OTA. Cannot downgrade since I'm S-ON.
I read somewhere in this thread someone tried to flash the boot.img in the root of the rom.zip so just to be sure I flashed the boot.img from the boot folder. Seems like it fixed the problem! @santod040 you should perhaps specify the correct boot.img to flash in the installation instructions - just a suggestion.
Ah yeah the one from the boot folder worked for me as well