Well, I had 14 soul stone fragment tokens on me that I was going to sell, but the seller wasn't available at the time, so I took a trip to Blood Dungeon and met up with a paragon Balron. I had the tokens in a bag so that they weren't messing up my backpack. And, when the balron killed me, he looted it. I wasn't able to kill the balron, so I logged out, defeated. I have no idea if anyone was able to loot that bag when the paragon was finally killed.
This was about 2 years ago when it happened, no idea if things have changed. But I NEVER put insured/blessed items inside a container in my backpack anymore.