Here's something else that is odd, however, that I just realized.
Even as any trace of "accepted' or "rejected" disappears after those first 20 minutes, the WU doesn't just plummet, as it would if nothing at all was really being submitted. Instead, the WU does it's usual thing- goes down some, goes up some, fluctuates as normal.
So it *appears* that for some extremely frustrating reason, the report and display goes offline after that first period of time, but continues to function afterward in the background. Will have to confirm this.
Extremely confusing. Any ideas h2o? I didn't touch a thing until I started having this issue, so I can't think of how it isn't something weird on the server side causing it, but who knows.
[EDIT]
So just letting one rig ride 'in the dark' for a while resulted in this another half hour or so later:
Pool 0 stratum share submission failure
Stratum connection to pool 0 interrupted
Lost 61 shares due to stratum disconnect on pool 0
Pool 0 difficulty changed to 1024
Pool 0 communication resumed, submitting work
Stratum connection to pool 0 interrupted
Lost 1 shares due to stratum disconnect on pool 0
Pool 0 difficulty changed to 1024
And then it's back to Accepted/Rejected shares.
The plot thickens?
[Second addition]
I let another rig do the same thing as the first, and the exact same thing happened, down to the same number of shares lost: 61 and 1.
Extremely curious indeed. What evil bug is it that I stalk here?
Oh, and third rig just popped at 61 and 1 shares lost. Beyond coincidence, now.