Yes; very often. It's reported in Beta and continues through the release versions. It seems to affect macOS only and not Windows from my experience. It also seems to begin when the Helper uses up to 100%, as soon as that happens it never seems to 'quiet' down again. If you minimise the CPU use drops away but maximise the window and it's back instantly. If you close the app and relaunch, it's relatively quiet until the next time 100% CPU is hit, then, you are back to square one.
Evernote is currently, by a country mile, the most CPU hungry app on my device, even my Windows 10 VM only takes 30% and that in itself has several open apps running
I am absolutely convinced this is the reason why many people are saying performance I slow, especially if their hardware is low spec