If your H2D has no Filament Track Switch and you slice with the OrcaSlicer 2.5.0 nightly, prints fail about 2 minutes in with:
0700-7400 The Filament Track Switch is offline.
0700-8029 This print requires a Filament Track Switch, but it is currently offline.

This happens whether you print from Bambuddy or straight from OrcaSlicer. The nightly tells the printer to load the filament into the opposite nozzle, which only the switch could do. We confirmed it on our own H2D: the same plate sliced in Bambu Studio prints fine with the same AMS slot.

Workaround: slice H2D jobs with Bambu Studio or a stable OrcaSlicer release until the fix is merged. If a print already failed, cancel it on the printer and re-slice.

Bambuddy issue: https://github.com/maziggy/bambuddy/issues/3220
OrcaSlicer issue and fix: https://github.com/OrcaSlicer/OrcaSlicer/issues/15927 / https://github.com/OrcaSlicer/OrcaSlicer/pull/15929