Body with Sanguine item disappeared

[Zaphida]

If you kill an NPC who has an important unique quest item on them, and you forget to take the item, after their body disappears the item will be lost forever and it appears there is no way to finish the quest without using console commands.
Context of relevant quest below:

Spoiler:

I killed Domba and Gnaw Tooth in Al Daedroth who have Belt of Sanguine Smiting and Ring of Sanguine Green Wisdom on them. I didn't realize this and left Al Daedroth after looting. Now I am doing the Threads of the Webspinner quest and have come back to retrieve these two threads but Domba and Gnaw Tooth's bodies have disappeared and I cannot get these items to complete the quest.

This seems like a bad oversight by the devs. A body shouldn't disappear if it has an important unique quest item on it.

Running on Windows 10 PC.
OpenMW version 0.48.0.
Latest Morrowind, Tribunal and Bloodmoon game files downloaded from Steam.
Tamriel Rebuilt, Patch for Purists, Morrowind Optimization Patch and texture packs installed.

[Archveult]

If they disappeared, then the items you are looking for are available elsewhere. And on at least one actor that you can't use "Dispose of Corpse" on.

[simhaus]

Have the same issue, but in my case, unfortunately, this does not disappear.