-snip- The issue above it was the same as my problem with 4.0.2 everytime you close the Electrum it crash but it's working fine you just need to force close them and reopen the Electrum. -snip-
I experienced something similar on macOS 10.15.7. When I closed the Electrum 4.0.4 application, I had to quit the application (⌘Q) several times or force it to close.
I also tried to use the Ledger Nano X with Electrum 4.0.4 and experienced the same thing when I closed the application; it didn't want to close. I tried to open existing menus, Electrum preferences; it remained open even though the Electrum main display was blank.
