What counts as Untracked Memory?

Hello, one of the games I work on currently suffers from a memory leakage problem due to the Untracked Memory heavily increasing overtime. I’ve been looking through multiple devforum posts on how to avoid high untracked memory, but no matter how many connections I disconnect or try their solutions, the game seems to keep on running into the same issue.

So my question is: What exactly counts as untracked memory other than connections?