I have the same issue with a check switch, about 30 seconds to complete, when turning on my Hoppers in the morning (with power toggle on Harmony remote). I have a mixed arc setup with 110/119 plus a separate dish for each of 61.5 and 72.7. The 4 satellites feed a DP44 then a dual node.
Further info, it appears to happen only if the guide has been updated overnight. Every once in a while the guide does not update and will not update on subsequent nights unless I do a front panel reset. It does not appear to relate to overnight recordings.
It's a minor nuissance, but it is related to the Hopper software/configuration because it never occurred with my previous 622/722/211.
I have no LOS to 77, and 61.5 and 72.7 only have LOS from two different locations on my garage. After I replace the roof shingles on my garage later this summer I will consider trying again on LOS with a 1000.2 EA dish and drop 110/119 if I really don't need them.
Otherwise the performance of these boxes has been awesome. If a DIRT rep wants more info, PM me please.