Desktop app has closed all open notes

[streetwriters]

I had several notes open on the OS X desktop application. They usually remained open.
But a few minutes ago, when I returned to Notesnook, I saw that all the notes had closed.
No data was lost, but it's annoying because I'm used to having several notes open at all times.

Device information:
App version: 3.3.8-406c637-desktop
OS: OS X 10.15.7
Browser: Electron 37.6.1
Plan: Pro (legacy)