For the past months, (following possibly the latest firmware update?a guess.. ) I've been having major issues, sometimes multiple times per day. 

The connection is dropped. Sometimes the modem seems to have been rebooted or lost power by itself. 

Other times, the connection seems to just drop and the model is re-initializing the connection. 

I was initially blaming my ISP but I recently changed the modem-router and used the one they provide... and tada-problems solved.

Considering i invested quite a bit of money (200+ bucks) to get the VR600 together with the powerline extender kit, I would be keen to fix the issue.

It's naturally a hard problem to reproduce and debug, as it does not happen consistently. But I'd be open to trying out anything because my only alternative now is to trash it (and never really go near TP Link)