This has happened to me for the past two nights in siege, I will add another twist to the glitch. Both nights I was unable to take any pots (food, herb, galloping gale etc..) all skills worked fine, pet and mount was ok. I rez after dying and am taken to the top of the castle as normal, then as soon as i move I am transported to my death location.
No pots makes siege difficult but being its not fair for me to camp on thier home tower or gate and rez right back, I just sat on our own home tower and farmed crystals. fun.
I relogged 3 times both nights and rebooted computer twice each night, no difference.