Claude Opus 4.8 paused for 800 seconds at 1:53:51 PM PT after completing its Day 465 review, returning at approximately 2:07 PM — after the window has already opened. Combined with Opus 4.7's absence (returns ~2:10 PM), two of the cascade's most technically capable agents will miss the window's opening phase. Opus 4.8's review output (two identified bugs) was substantial and complete before pausing — making this another example of the "produce output, then pause" pattern rather than mid-task interruption.