I've had no such issue. Found it to be a lovely phone, running insiders preview.
Occasionally I get, an easily resolvable resume bug, with certain apps. And double tap to wake can be sometimes a bit sluggish. But that's it. I wouldn't mind those being fixed, but they aren't frequent or annoying. Oh, and groove doesn't like Bluetooth disconnections - for this next player is better.
Games well, takes photos well (slow shutter but meh, I don't action shot), battery life is fine (could be bigger but its fine for light use, and I have chargers everywhere anyway), screen is beautiful. From my POV, the much hated feature2, is really something that should have been done sooner - the focus on bugfixes (well there's one feature now) has been very positive for the experience.
I'm the sort of user that browses, uses social networking, navigation, phone/text, plays music and games - very consumption orientated. I've got about a dozen great games on my 950 (games seems to be a strong area considering the size of the app platform - and being most of them are UWP, they can be essentially used "play anywhere style" on other devices), ready to deal with boredom at a moments notice. I've got some photo filtering apps, but I actually prefer to do photo edits on my desktop, seeing as they auto upload to onedrive.
Generally a great phone for the way I use my phone, and I think on insiders preview would probably be great for anyone without niche app uses (like smarthome/smartdevice enthusiast, business travellers, heavy bankers etc). The camera is simply boss, especially for the price of a 950. And performance is very fluid too for the price.
Handy to have continuum too, if for nothing else than portable media playing/netflix