Sorting by priorities broken in orq-ql-block

When I use org-ql-block, apparently org-agenda-sorting-strategy is used to sort the entries. However, there is something wrong with sorting by priorities, when using `priority-down' in org-agenda-sorting-strategy. Entries with defined properties are sorted in the opposite direction, e.g. C-B-A rather than A-B-C. This is different from sorting in standard agendas, without org-ql-block. Entries without defined priorities are put last, which is correct.