Hello my friend, I think you can help me on a question here, since the first compilations of custom roms oreo, I have the same problem, I make the installation clean, the system goes up without problems, everything in order, working well, however, when I restore my backup through titanium, and restart my cell phone, I lose my calls, everything works fine, except for the native voice call function, no one can talk to me through conventional calls, I make calls normally, I just do not receive them, Intense research on my part in various forums, and even in discussions by telegran, and there are no reports of anything similar, I believe that with your knowledge I can achieve some success, my phone is the Moto Z XT 1650-03 (griffin). I'm counting on your help, hahaha, sorry for any inconvenience.
PS. Sorry for the bad English.