After loot is dropped in raid, the center of the screen has a hidden window that is preventing right-clicking. Multiple raiders experiencing it, only happens after RCLoot. Reloading does fix the issue

Seconded, Thirded, Fourthed, Fifthed (at least from numerous raid members, including myself).

Cannot interact with NPC's, have to turn your screen weird to right click anything. It's a massive hidden window that takes up the middle 1/2 of the screen.

Fixed with v3.10.3 - thanks for the report