When an error message appears while the player is in third-person mode, the areas you can interact with do not match with what appears on screen. Seemingly, they appear to correspond to what their position would be if it was rendered relative to the player in third-person instead of relative to the screen.

Can be replicated by entering third-person before triggering a condition that causes an error to appear, such as by having the application not respond.

Appears similar to https://feedback.vrchat.com/third-person-view/p/disable-third-person-view-when-error-message-appears, yet the error message actually renders on screen correctly; it's only the interactable area that gets impacted by this.