I have been trialing Zoho Notes syncing between my PC and iphone.

No problems with iphone but the Windows  64 bit app ver 2.2.8 was very
 buggy and would lock up completely, needing a Control Alt Delete etc to close it down.
It seemed to be connected to syncing. Uninstalling and re installing made no difference.
I was ready to ditch Notes altogether.
I uninstalled it and found the online version was stable.

Out of curiosity I downloaded and installed the same app from Microsoft Store ver 2.2.8.
It works as it should with no sign of issues. Syncs seamlessly.
I realise this sounds silly but could there possibly be any differences between the two apps.
Now going to buy a 1 year sub, as Notebook has a great GUI and lots of features, and is snappy,
definitely a Evernote killer.