TMP fills up with mis-conversion when Core thumb creation is enabled

I recently turned on the Core Thumbnail generation checkbox, and soon after, began getting my TMP space filled up with gigabyte-sized PAM files, like “magick-sf849VDpMQ4X37URwYmot16yF3ZkiJw3.pam”.

It appears that the Core Thumbnail logic is not excluding non-photo media files like “christmas5_640.mp4” and attempts to convert them, allowing the process to go wild until TMP disk space runs out.