In case the cache hasn't actually been indexed yet. Maybe fixes#8438.
(cherry picked from commit f5873d70c640b9deb53a9a62281403b9a657e644)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadPendingDeleter.kt
# app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt