Kick drum drops out in rendering

Cubase
1

I have been struggling with a weird rendering drop out on a tune.
Every time I render, the kick drum is just not there, It plays fine when I listen, but when I bounce it down it disappears,
its soo weird, I’m running Cubase 12 pro.
I cannot fathom it, every time I render it gets worse, so originally the kick just suddenly stopped towards the end of the tune, but now when I re-render it just disappears completely. anyone else had this or know why?

For context this is bass heavy kick driven dance music!

2

Hi and welcome to the forum!

Is there some kind of automation on the kick? Could have happened by accident.

What’s the routing of your kick? Any (external) plugins involved?

Have you tried to do a mixdown in realtime?

3

I think it would be beneficial to include as much information as you can regarding this disappearing kick drum. So to add to @Reco29’s inquiries above, could you describe the full signal flow of the kick? Where does it originate from (a VSTi, a clip on an Audio Track, Sampler Track, etc.)? How is the output routed? Insert plugins used? Side chains? And so on.
Screenshots showing the full signal path in the Mix Console could also be of help.