If I close the lid of my Macbook, the Macbook becomes very hot after some time and if I open it I see that was not going into sleep mode. If I click on the battery icon it is written that Enpass has a very high energy consumption. This is only the case if the Mac has no connection to the internet. As soon as I am able to connect to the Internet, everything is fine. It seems that Enpass tries to sync with iCloud drive and because there is no Internet connection, it is trying and trying.
I am using the latest public beta of macOS 11.
Maybe a bug on Enpass side, maybe not. But hopefully you can have a look into this issue.