BUG: Preload files are being cache’d
Pretty much every single custom game with a large player base is using these Preload files to track player stats for in-game progression or leaderboards. Essentially, this bug is breaking the integrity of 95% of hosted custom games and really hurting the respective communities.
I believe this is also breaking some campaign checkpoints.
EDIT: Here is a video explaining the bug in DETAIL: Patch 1.33-1.34 Cache Bug Tutorial: How to Reproduce - YouTube