4.15.8 is the latest version on Google Play.  When can we expect 4.16.9 to be available?

Android settings are set to: Notifications = 'on for all apps' and... Battery saver = 'off'

Same issue.  Pixel 2 running Android 8.1.0 and SA 4.15.8(269).  I don't believe I've received any notifications since upgrading about 4 weeks ago.