Did you ever get a response from anyone about this? I've even re-installed windows and with only Enpass installed, put to sleep and awake from sleep, enpass is locked up. You are correct, I guess they don't care.
I'm having the exact same issue. Let me guess, Enpass Helper becomes unusable after waking from sleep? The icon is still visible in the system tray but is seized and using the browser extension acts as if the helper isn't loaded. I've tried every possible combination of boot scenarios to rule out conflicts with the only possible culprit being enpass helper having the problem. I also have a Surface Pro 3 that is having a different problem with the Enpass helper; upon boot or trying to launch enpass helper, I get Windows stop message: C:\Program FIles..BLAH BLAH Enpass.exe