Ok, thanks for the patience to all testers.
I will not longer try to fix this bug until somebody can show me how to reproduce this here at home - sorry...
You can try This to reproduce problem:
Scan couple of sattelites eg: Hotbird 13e + Astra 19e in one scan to fill "Last Scanned" and try to run Dreamstream.
I had this problem couple of months ago and deleting this buquet helped me
But i have another problem now On newst openpli images when i watch mkv move on my dreambox and simultanously try to run dreamstream i cannot watch tv channels (some time ago when i tried that it worked) i do not now if this is a problem with openpli or adreamstream becouse in meantime i changed my setup drasticly (new laptop, new windows ) When i run dreamstream wathing a tv channel on dreambox it works fime
Regards
Jarek