You said this already but it doesn't make sense.
Hoffman starts the inning, walks Pages. Should have absolutely been pulled there.
The next 3 batters were Muncy-Freeland-Call. Could have put in Fluharty or Nance there, even if you use Nance you could switch to Flu for Ohtani.
3 batter rule had nothing to do with it. Schneider straight up goofed and we are lucky Fluharty locked tf in and won us the game.