Receiver Duo+ blocked - busy sign in top left corner

j-fm

Vu+ Newbie
Can anyone tell me what the round blue/white icon means flashing in the top left hand corner of the screen? SI can't change channel, select menu or anything. I'm using the latest version of OBH.
When it appears the only way I can clear it is by physically turning the receiver off and on with the rocker switch.
 
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