face tag doesn't work anymore after disabling it in N9
 

I had this face tag thing working when I first updated to PR1.2. Then I read here that it might be causing the whole system to lag a bit so I disabled it. Now I'm trying it again but just doesn't work. I have to manually do Insert face. I dont get that '?' anymore on tapping on the face nor does it suggest anything on the pic.. Tried disabling and reenabling, restarting and whatnot but to no avail. Any ideas?? Thanks.