HI. I also see this from time to time with my standard TS-2K and RRC-v1. But it seems to be depending on the "line" and traffic conditions on the internet connection used. I have noticed that holding the power on/of button a half second is enough, and the radio and panel switch off after some seconds. Other times it's instant. The delay is especially frequent when running via 3G(shared internet trough laptop), and just some times when running via wireless 2,4 GHz router set up as a client/bridge.
There are seldom delay when connected directly via the router's LAN cable.
But when i was in the middle east earlier this year i had this all the time. But it always turned on or off after a few seconds anyway. So i've concluded that it is just the way it is:-)
73 de
LB9GE Trond