2016 F3 Limited Top Case

[bline11]

Looking for some help here. I have the 2016 F3 Limited and I installed the top case roadster kit. I have the amp and I have updated the software to the newest version. I get sound out of the back speakers but the issue is this. The back speakers seem to stop abruptly during different parts of songs causing a "thump/bang" noise that is driving me crazy. It seems to be better when I have the automatic volume increaser/reducer set to Zero. I have been looking on the forum and I have not seem others with the same issue. So any help would be greatly appreciated!

Thanks!