Hello,
I've tried Google Chrome, Forefox and Microsoft Edge. Same issue. There is no prompt on the website to ckeck "keep me signed in" or something like that. After the imput of apple ID and password the webseite wants to go back to enpass but hangs in all 3 browsers forever. Sync works then until the next day. So I still have to reconnect every day wich sucks pretty much, because it's the device I use the most.