Try another clean flash again with the latest build, it didn't work for me also on the first clean flash but it worked out on the second clean flash I did.
Selinux setting is under Settings --> Configurations --> Miscellaneous tab.
Hope it will eventually work out for you, good luck.
Sadly, the phone call issue is back after 22 hours of good working! I cleaned flash twice, the only thing I didn't, is factory reset, because it don't works: when I click on reset, after the warning alert popup, nothing happen, the reset doesn't work. But on recovery twrp, I cleaned cache, dalvik, system, internal. Then flash rom and gapps nano.
I'm I the only one with this issue?