I've the same problem with the last update (May Patch Oreo 8.1). After some usage hours the N7 plus become laggy, the animation speed in multi tasking become like an LG phone of 10 years ago.……
I hope that Nokia suppport read this posts, because this phone have a great potential, but it's incomprehenible that a pure android one have this big lag problems! (I've try the factory reset 3 times….. nothing change)
No GEMINI75 it's the UI itself being slow and laggy, had this problem since the April security patch, only tiny improvement with May security patch, I hope Nokia will fix this soon! The original software of android 8.0 was much more stable
I've got the same issue. The GUI stutters happens in these situations for me:
1) Swiping left to the Google app from stock launcher (Launcher3), or just launching the app. About 60% of the time now, to the point I have switched launchers and have stopped using the Google app.
2) When switching apps using the multitasking. Some apps lag (frame rate stutter) more than others when switching. About 90% of the time.
3) Changing orientation in settings. happens about 30% of the time.
4) App Drawer pull up in stock launcher. Happens about 80% of the time.
I've factory reset the phone a few times. No difference. Also tried with just the pre-installed apps in the phone after reset. Still no improvement on frame rate.
When first I tried the phone at the store to check it's performance, it seemed fast, but the difference was, the phone wasn't connected to any network or wifi or was associated to any accounts, the Google App page was blank, and most of the apps didn't have much to render so, sure it was smooth then. And no, it's not having the wifi or phone network on that makes it stutter, I've tried it on flight mode on my phone.
Also, I'm stuck with this phone now, since the store won't take it back unless they can verify an actual defect with it...
I am convinced that the problem is poor optimisation of the firmware or with oero 8.1, or both.
I hope they patch it soon, and way before Android P releases, mainly because I'd rather not have to wait a few more months for a fix so that my phone doesn't feel like an old cheap low range phone.
This is my first time back to Nokia since my Windows Phone days (Lumia 820, Lumia 930, Lumia 640XL) , so, Nokia reps, devs and moderators and decision makers, please don't make me regret my decision of coming back to your brand.