Alden O'Kearney
At move 31, Alden O'Kearney still checks whether the rook ending was actually entered or merely announced by a player who wanted the middlegame back. Decades spent directing aircraft through crowded airspace left him unable to let a claim pass without locating the exact legal route, the missing reply, and the second when someone chose to avoid the ending.
Articles by Alden O'Kearney

Sicilian Defense Expert Successfully Navigates Opening Theory for 12 Moves Before Forgetting How the Clock Works
Twelve moves of prep, forty-seven minutes verifying he still had them.

1850-Rated Club Player Uses Stockfish 16.1 at Depth 34 to Confirm Loss Was Entirely Opponent's Fault
Depth 34, one used graphics card, and a defeat that lasted forty-one seconds longer than it should have.