Since I installed 0.9.11 on Kubuntu 20.10, I have noticed that it closes periodically. I don't know if "crash" is the right word, but it may be. I have it configured to autostart on login, and I can enter my password and open it. A little while later, I look for it and it's not there. I don't remember noticing this with a previous version.
1Password Version: 0.9.11
Extension Version: 1Password X 1.23
OS Version: Kubuntu 20.10
Sync Type: 1Password