I've been using the Windows Store (UWP) version of the OneNote app for the last month (version 16001.11231.20118.0). This week, it has crashed 10 times in two days. From the Task Manager, I can see that it grabbing 4 GB of memory (out of 8 GB) and regularly spikes the CPU as well.
I am using Windows 10 build 1809. Has anyone else noticed this behaviour?
I was also having issues accessing a Notebook stored on another organisation's SharePoint intranet. This used to work fine up until a week ago.
I have now installed OneNote 2016 again. I am able to connect to the external notebook and the app is behaving itself so far.