Blizzard
Earlier today, we deployed a WoW Classic hotfix to all regions:
The in-game combat log radius has been fixed, and now only displays information for units that are within 50 yards of the player.
This is closer to the original behavior of WoW 1.12, and should eliminate the ability for addons to extend players’ senses and detect enemy actions at a greater distance than intended.
This fix does not affect text logs that the game outputs for raid parses.