First off I've contacted Sennheiser support about this and the chappy on the phone was helpful although the relevant people were a bit hard to get hold of to troubleshoot (currently on holiday, I missed him after calling back a fortnight ago as well).
Basically one of my KH80s keeps on powercycling or restarting itself. This was happening with or without audio running through it. V annoying and has happened in the middle of a take before. It's been happening more often recently and unfortunately has now started happening in the other one as well.
Interestingly I was producing all last night with a lot of 'sub' bass hits going through the speakers and it didn't happen once. Typically I've very much been sporadically going back and forth to my setup and I'm starting to wonder if that has something to do with it as from what I gather the auto power off circuits of gear can cause problems. Maybe with them constantly working hard they're a bit more 'warmed up' and less likely to power cycle?
So yeah, it would be good to hear of other peoples experiences with these monitors which, as good as they sound have really turned me off DSP monitors. TBH I'm not even very keen on the sound of them when they're in room correction eq mode and prefer to run them flat.
Few more details; I think from when I first bought them one of the two was less inclined to auto power off but at that time I suspected it was due to one of the main outs on my Mackie desk being a bit noisier than the other. So at that point I didn't bother contacting Red Dog who I bought them off and then after a while they unfortunately went bust. So now these monitors are well out of warranty. Also, I use them in local control mode and have tried the reset thing, interestingly I've just tried it again this second and the slightly better speaker won't reset to factory default mode and isn't being recognised by the Neumann control app

All pretty disappointing if you ask me. The option to get them replaced at £234 each is always there but I think I'm probably out when it comes to having computers in my speakers tbh.
Oh yeah, and Neumann never implemented the low latency mode...