When I try open text files using Dolphin, after opening 2 times, Dolphin dolphin freezes and stop from work. It happens when both text files are opening by default Kate. 
After it when I close one of tab with file at Kate, Dolphin pop up a error "KDEInit could not launch '/usr/bin/kate'" and is back from freeze.

Reproducible: Always

Steps to Reproduce:
1. Open Dolphin 
2. Try to open any two text files by left mouse click.

Actual Results:  
Kate by default will open 2 files in 2 tabs and Dolphin will stop from work.

Expected Results:  
Not freeze after opening 2 files.

Tried with plasma version 5.2.2 and 5.3 beta. 
Bug occurs on both.