According to u/Sagezu on Reddit, the bug - which is thought to have been introduced in the MMO’s most recent update - sees your item UI get stuck to the mouse pointer, essentially prohibiting you from doing anything else. In a thread entitled “GAME BREAKING VALTAN BUG ruined the whole raid by not being able to click !!!” the Lost Ark player even added a video to exemplify the issue: From the numerous responses from other players, it seems as though this isn’t an isolated issue, and looks to be affecting the game outside of the raid, too. For now, it looks like only exiting the game is the only way to “fix” the issue - which is incredibly frustrating for players in the midst of a complex raid. Here’s hoping there’s a hotfix soon. In the Lost Ark Eurogamer review, we said: “action-packed dungeons make Lost Ark’s early stages a real romp, but without a convincing hook beyond the combat, things get a little stale”.