I have exactly the same problem - I have to click repeatedly within a note before I start to edit it otherwise it jumps around in the note randomly and doesn't respond to the text I type.
This also happens when trying to copy and paste sections of text, where it simply isn't recognised, and even a right click "copy" despite seeming to acknowledge the command, doesn't work.
This is such an inconvenience that if it doesn't get fixed I will have to reconsider my subscription and whether there are alternatives to Evernote.