In plasma 5.7 (issue first appeared 5.6.95) the chromium launcher sometimes randomly does not show in the task bar after closing down the browser. (have chromium set to show a launcher when not running)
It seems to be only for chromium and chrome. I also have thunderbird & dolphin selected to show a launcher when not running and they have never skipped a beat.
Tried testing with firefox and that also seems fine.
Anybody else seeing this?
Perhaps I need to report a bug upstream.