Interact-able objects, like corpses, become non-interactive and /reloadui is required to fix it. The objects still glow as if they're interact-able, but there's no prompt for interaction.
In dungeons I usually have to /reloadui, sometimes more than once, because I can't loot corpses. It also occurs in non-dungeon areas but not as often.
Edited by N00BxV1 on 3 August 2017 16:18