Hi,
I've got the same problem on my Mac. After standby, Enpass uses about 100% of the CPU activity and that's not all.
In addition, the browser extension doesn't work any more: when I click on the icon in the toolbar, the pop-up window doesn't appear. I have to relaunch Enpass to get back te smooth functioning but, cmd + Q also doesn't work and I have to click on the Enpass menu, then "Quit Enpass".
After opening it again, avery works correctly… until an the next standby period.
Er… Ok. This issue is quite annoying, but that doesn't cause a Mac explosion.