ErfgoedBot’s categorisation task is currently stalled. There is a huge backlog of images for which ErfgoedBot can do nothing (because they have no ID, or no better category can be inferred from the database). This means that it spends hours going through the same images, before getting to the new ones that need it.
It also blocks harvesting, since both are done in one job, and that there can only be one job running − harvesting is not daily, but currently more than 2 days.
I would be tempted to blacklist the countries with a backlog of thousands of files, which have been sitting there for a year (see https://commons.wikimedia.org/wiki/Commons:Monuments_database/Categorization/Statistics )