I had two separate problems with Slack on Ubuntu Linux: first, every time I opened it I had to log in again across all my workspaces. Then it stopped opening entirely.
It turns out the snap version (4.47.69) has a known issue and a workaround is to launch Slack with:
slack --ozone-platform=x11BashAlternatively, you can install the .deb version. I went with this option, and it also fixed the login problem.
Since then, I’ve dropped the Snap version entirely and switched to the .deb package. Writing this down in case anyone else runs into the same issues.
