I'm using Enpass 188.8.131.527 which is the latest version that works properly for me. Both 184.108.40.2061 and 220.127.116.117 tend to lock up or take a very long amount of time (minutes) when searching and displaying an entry. The UI just locks up and it takes quite some time to come back. All issues are gone once I switched back to 18.104.22.1687
I'm running Ubuntu Budgie 19.04 on X11.