Don't know if this is any help but since Xmas time my card stopped updating in a dm500 running oscam and ran out of entitlements. I made a post about it here, paired it to an SD box and the card updated but it's never updated via oscam since.
Yesterday I put the card back in the SD box to update and noticed the channel listings are out of order. The sports channels start at 409, it looks like it's the HD channel list but with all HD channels missing.
After reading this thread today I checked the affected channels on the SD box. All other channels clear almost instantly but the affected channels take 2-3 seconds to open.