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When loading DVDs the stage of opening the disk/processing titles is mostly taking upwards of 20 minutes before it lists titles for me to select. If opening a blu-ray it is generally only about a minute. The time to rip makes more sense - c. 20 minutes for DVD and 40 for a blu-ray; it is just the initial loading that is problematic. What might be going on? I have tested multiple DVDs and blu-rays, the behaviour is consistent across all disks.

OS: OpenSUSE Tumbleweed Linux (fully up to date)
Drive: Pioneer BDR-XD07 (external USB drive)

An update because I have now encountered some which are not taking excessively long. Titles that have taken a long time scanning titles (mostly around 20 minutes:

Star Wars, Ep IV, V and V, 2004 DVD release
Paprika (1996)
Laputa Castle in the Sky
Grave of the Fireflies
The Castle of Cagliostro
My Neighbour Totoro
The Cat Returns
Nausicaa of the Valley of the Wind
Princess Monoke
Porco Rosso

Titles seen so far that have not taken long:
From Russia With Love (Ultimate 007 edition)
You Only Live Twice (Ultimate 007 edition)