Resolved by rootGroup.getObjectByName(path) rather than through the loader
registry, matching the sibling commits: the placeholder was attached at node-load
time, so the scene graph is the single source of truth for "where does this
node's geometry live", and a registry lookup could disagree with it after a
dataset switch.
Commit a staged mesh projection into the scene.
Resolved by
rootGroup.getObjectByName(path)rather than through the loader registry, matching the sibling commits: the placeholder was attached at node-load time, so the scene graph is the single source of truth for "where does this node's geometry live", and a registry lookup could disagree with it after a dataset switch.