Hi Jason,
Does this happen with all IR's, or just that particular one? Is this a .kipr file that you converted, and if so, was it with the most recent version of Cab Maker?I don't own a Kemper, and am not close with anyone who does to be familiar with the unit or able to test anything here directly (which was one of the several reasons I stopped providing .kipr files). If reconverting the file(s) with the newest version of their software and making sure your unit is on the newest firmware doesn't do the trick, I'd shoot their support an email and see if they have any ideas as it would definitely be a bug they would need to look into. If not a bug, then an oversight of needing to make sure that they re-normalize files down to a level that safely operates within the unit when they are converted to .kipr. I remember back in the day that the FAS conversion would re-normalize files down to somewhere around the -6.0 dB mark, likely for this same reason. If you let me know which file it is, i can make a quick re-render of it at -6.0 to see if that resolves the issue, and would be something to report to them (as every IR creator normalizes to almost full scale, so requesting I make my files lower for their platform wouldn't do them any good and the issue would repeat itself indefinitely).
Hope that helps!All the best,
KevinOwnHammer.com