For the past week my Nexus 4 (stock OS) has not been giving me notifications on messengers. I have Nova Launcher, and I did have the Telsa Unread addon or something like that, which I uninstalled to maybe solve the issue, but it didn't work. I do sometimes, however, if I haven't been on my phone overnight, reieve all my messages in waves. This is such a large issue for me - I'm missing messages hourly. Thank you for any help!