This problem is new since I updated IOS from v11.3.1 to 12.4.3 (yes, in one fell swoop) on my 5S and, at essentially the same time, upgraded the Amazon Music app from ?? version (I didn't note the version #) to the current version (126.96.36.19998). Problem statement: When listening to Amazon Music, Siri no longer gives Apple Maps directions. Instead, when Siri would give directions I instead get a two-tone sound (sorta like a traditional doorbell ding-dong). When running any other app than the Amazon Music app, for example, the Pandora app, the Spotify app, or the Apple music app, Siri correctly 'intrudes' with driving directions as it has always done. I cannot find a setting that appears to control this in Amazon Music settings or Apple Maps setting, although maybe I did not look in the right place. I welcome any suggestions for troubleshooting this.