'Manuscript Images' on Scribe record always shows 0

[pastokes]

The 'Manuscript Images' tab on Scribe records seems always to show 0, even when there are images. Clicking on the tab shows the images correctly. This issue seems to be right through all released versions: it's visible on DigiPal (e.g. https://www.digipal.eu/digipal/scribes/1/), MoA (not obviously because scribes aren't normally visible, but see https://www.modelsofauthority.ac.uk/digipal/scribes/1/) and also on Archetype 2.1.1. Being logged in to admin or not seems to make no difference (on MoA no images are visible for those not logged in but they are publicly visible on DigiPal and my instance of Archetype).