Apple Watch timer stops music

I have been struggling with my apple watch timer stopping music when I am trying to use it to do interval training during running workouts. It is super annoying. The only way to start the music again is to pull out my phone and manually press play on the music app (Pandora in this case). I finally solved the problem through an inelegant work around that I wanted to share. Go to Watch > General > Airplane Mode. Turn off "Mirror iPhone," "Wi-Fi" and "Bluetooth". This will completely disconnect your watch from your phone when you use airplane mode on it (swipe up and press the airplane button). Then you can use the timer while running without it messing with the music on your phone. The other thing I discovered by doing this is that my running workout measurements were ironically far more accurate! I have been using the watch workout app on my watch and an app called Runmeter on my phone. The apple work out app always has my runs as shorter and at a slower pace than Runmeter - generally 10-30 secs/mile slower. I think this is because if there is any break in cellular connectivity, it counts it against me? This problem totally disappeared when I did my run with the watch in airplane mode. The stats were exactly the same as Runmeter. My pace was faster and even my VO2 max was 1/2 a point higher. Apple you need to fix this!