I’m absolutely fine with leaving being like this, as long as the crash is fixed 
Just to possibly save you trouble: it seemed to me that engine always works with the nearest downbeat (“One”) not with the nearest beat (4 in this case), so the problem might possibly come from exactly that. It makes sense from a Denon perspective even, if the “ghost” marker that LXC sets does not have the correct bpm to sync up to the next full bar. Just a thought.
Edit: The crash that happens with flexible beatgrids sometimes: