No feedback on this yet? It really seems like with high rates the (sub)bass response of the reverb device is lacking compared to low rates. I think it could be matter of some DC/Hipass filter in the device not adjusting itself, or in the wrong direction, depending on sample rate? Or is the whole algo fixed to a single rate - then you should consider choosing a rate, and just resampling the beast for all other rates. Broken renders are a showstopper! It made a dark cavernous rumble sound turn into weak wet farts, not the intended sound I had in mind and ears while constructing it… 
For the record, the projects that use the reverb and that sound too different when rendered in hi res, I decided to use this technique in: https://forum.renoise.com/t/generating-own-irs-for-the-convolver-from-plugins-in-renoise/48700
First tests seem it sounds a lot like the original device, though it takes 2x-4x the cpu power. Also it destroys the algorithmic (nonlinear) quality of the reverb making it sound less organic, the same reaction with the same sound all the time instead, though it is less worse then I first feared.