Safari 13.0.5 (15608.5.11) in macOS 10.15.3 (19D76) on computer1.
With the Plesk web server interface login page already open, Enpass always opens new Safari tab for Plesk web server interface login and enters the login data in the new tab, apparently ignoring the already open tab.
I've tried three other browsers and all of them log into the Plesk web server interface without opening an extra tab:
Chrome 79.0.3945.130 in macOS 10.15.3 (19D76) on computer1.
Chrome 80.0.3987.106 in macOS 10.15.3 (19D76) on computer1.
Safari 13.0.5 (13608.5.12) in macOS 10.13.6 (17G10021) on computer2.
I've been ignoring this since macOS Mojave because I thought it might be a bug in Enpass, but today I finally had a few moments to try and deal with it. Disabling Safari Extensions (except the Enpass extension of course) had no effect.
Does anyone have a suggestion for how to fix this?