User-Agent:       Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML,
like Gecko) Chrome/47.0.2526.80 Safari/537.36
Build Identifier: 

Leap 42.1 with plasma 5.5.1
When booting, plasma randomly loads instances of dolphin.
Session is set to restore on boot but Dolphin in prev sessions have always been
closed (so this indicates that the process wasn't really terminated on close)
Setting to start with a new session stops the problem.
Today on boot - plasma kindly started six instances of dolphin for me.

Reproducible: Sometimes