When hitting the the ridiculously small area in which you can loot a dead player and you finally managed to access the inventory, more often than not the clothes appear empty. Weapons have no attachments.
You can not access them at all - until the status is refreshed. You can force this by putting an additional item in a clothing (if capacity < max) or by adding an attachment to the weapon. Or throw the items on the ground and relog.

It's annoying and in the game since May.