First off, EC or CC? EC has some nasty, NASTY item movement bugs but i'm not really up on the current status of them, and which is fixed or not, and I assure you the devs didn't look into making sure the EC's new functionality worked properly with siege's unique item bless system (as it does work slightly differently than personal blesses used to) so i'll assume CC.
There's things that can cause bless to drop if you're not very careful with it, most notably re-dress macros if not set up properly in uoassist. (which is one of the reasons I don't use UOA for anything but a "use trapped crate" macro and bandage use countdown), anything that can cause an item to swap through a non-backpack container, even for a split second will cause an unbless as well. (did you maybe have an undress bag and put it inside a secure, if so your undress UOA macro, if you use one, can still find it and will still swap items through there).
Dragging it with your mouse cursor when you die, like if you were trying to click something else on the paperdoll, could also potentially make it drop to your pack,or having something like a BOD book that takes up far more spots in your backpack then it looks like it should and not having room when you res.
One more thing that comes to mind is when you move items too fast, it's possible to bug your backpack until relog if you move items around too quickly. (you'd think it not possible by hand, but it is!! easiest way to break your backpack is ctrl+shift at a spawn rapidly picking up gold piles, sometimes you get that last one that wont fit in your bag due to being overweight snap back but still show stuck in your pack....then your pack doesn't quite work properly until you relog again.)
If you're 100% sure it wasn't these, then there's the chance it was a bug, but as it's only happened to you on the entire shard, it might help to know what you've been doing before these occured, if it were simple random occurence it should have happened by now to people who die far more often (such as members of Gilfane).
Of particular interest were you doing anything on a boat, or anything with the new bazaar vendors, or have you used hair dye/race change/anything that could alter your character in any way shortly before it happened.
As for the legacy token was it confirmed that it was looted when you died, and have you made absolute sure it didn't just pop to your bank box as the game tries to do when it fails to drop the item to you? (sometimes you have to dig though, it doesn't necessarily pop on top). Things that can cause personal blessed items to unbless are common, but not since the container bug have i heard of anything that can cause actual blessed items to drop.
