Looped music does not follow audio config in the final rendered output.

Hi. I use Premiere Rush v2.3.0 (Build 832)

I use the music from the library for video background music. To ensure the music level is below the voice level, I always use the auto volume and auto duck set to reduced by 87%. The music clip volume  is set at 40. When all is good, I duplicated the musuic clipings a few time to make sure it stays looped until end of my video (since RU didnt have loop music options that I know of). I re-check each music clipings config to ensure it follows the original clipings. In the RU all goes as set up. When I render the video out. The output is frustrating. Only the first music cliping is following the config. The others all annoyingly overule the main voice audio. 

Please check the video: https://youtu.be/wBEDsETadhQ

How do I fix this?