There seems to be a window matching bug between the Slack snap and Chrome.
If you open a URL from within Slack without Chrome open, then the launcher shows the extra pip next to Slack and doesn't add a Chrome icon to the launcher. If you open Chrome first, then things work as expected.
Steps to reproduce
1. Install Slack snap and Chrome deb.
2. Join a Slack channel and open a hyperlink. Notice the extra pip next to Slack in the launcher.
3. Close Chrome and reopen it.
4. Open a URL from Slack again and notice the Chrome icon get added to the launcher.
I'm not sure if this is an Ubuntu Dock or GNOME Shell issue.
There seems to be a window matching bug between the Slack snap and Chrome.
If you open a URL from within Slack without Chrome open, then the launcher shows the extra pip next to Slack and doesn't add a Chrome icon to the launcher. If you open Chrome first, then things work as expected.
Steps to reproduce
1. Install Slack snap and Chrome deb.
2. Join a Slack channel and open a hyperlink. Notice the extra pip next to Slack in the launcher.
3. Close Chrome and reopen it.
4. Open a URL from Slack again and notice the Chrome icon get added to the launcher.
I'm not sure if this is an Ubuntu Dock or GNOME Shell issue.