No, they were gone completely... After save/loads or multiple fast travels, I can load my previous savegame and these items are still there, but sometimes they are just absent. It doesn't matter if a savegame is old or new, I can play the game normally and then load my previous savegame just to notice that items are still there or gone. My modlist is short, USSEP, blended roads, weapon and armor fixes, and other texture/meshes replacers stuff without esp files. Location where I encountered disappearing items bug is Hela's Folly, there is a statue of dibella, some souls gems, and gems under the water, another location is Birna's Oddments, gold pouches and gold coins on her desk were gone on save/reload. I don't think it has anything to do with bethini, because it happened in vanilla. I was confused, because it happened right after I started to use bethini, but it's not related.