Normal chests disappearing from campaign maps

so normal chests either are there when loading area or they have mystically disappeared and only cashes with dungeon keys can be found from area. if loading area again by visiting town you have a chance to fix it but that doesn’t work every time. this results in loss of runes, glyphs and unique items and if you find monoliths a bit of chore like i do makes campaign and trying new things in builds for 60 to 70 lvl allmost unplayable.