Strange, normally this occurs only when power is removed from board. I have used PE1, but not PE2, but this shouldn't be reason for it to occur.
I have used:-
i) F4-3200C14D-16GTZ
ii) F4-3200C14Q-32GVK all four and two dimms as well.
iii) F4-3200C14Q-32GTZSW all four and two dimms as well.
All of the above a same Samsung B die, single rank/sided as your F4-3600C15D-16GTZ.
Perhaps make a video of post cycle, Q-LEDs/Q-Code visable.
Go to tool page, ASUS User Profile, load/save to USB and create txt of settings and share. Perhaps someone can see a setting that may need tweaking to resolve issue.