Disabled is OK. I have a Vu+ Duo and a Gigablue Quad and have never had any sustained issues with EPG. EPG is stored to the HDD. System/EPG/Cross EPG /Configure is set as
Attachment 26918
System/EPG/Settings are
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OpenTV providers Attachment 26920
I have no PowerTimers set. XMLTV is (and always has been) disabled.
I have however fresh flashed both boxes within the last month/6 weeks. I did not use settings back up at all and used the startup wizard to configure the STBs before FTP of cam/DBE of bouquets. The only things that have remained constant are Timers and Autotimers. I copy the files to my PC and FTP them back once fresh flash is complete.
backing up timers
http://www.world-of-satellite.com/showpost.php?p=220315
Your box starting up (and loss of EPG) can happen if it is not powered down correctly. EPG is stored in flash while the box is running. It's saved from/to the HDD on power up/down. If, for example, a power outage happens you may get your symptoms. Do you mains power off? Do you you have a mains timer?
Both my boxes run perfectly, both are wired to router, both have static IPs and both are maintained to the latest builds (updated a day after build release)
If these settings don't help then save your timers to PC and do a fresh flash. If you still use a USB - format that too (just in case there are old EPG files still there) and double check your HDD is mounted. These boxes are like PC's in that files/paths/settings can become corrupt and they are open to virus also. A fresh flash does not take too long either! Hope you get sorted.
Tapatalker