Adding and removing variables to character blueprint slowly builds RAM

Adding and removing variables to character blueprint slowly builds RAM, this value does not drop until editor is closed and re-opened.

Regression (no) issue (does) occur in 4.12.5

1. Open Editor (any project)
2. Add new blueprint (character)
3. Open Task manager>Processes and find UE4Editor.exe
4. Add Variable (any)
5. Add multiple variables
6. Remove variables
7. Repeat last two steps several times

Results

Amount of RAM used constantly goes up, albeit slowly. This value does not decrease when variables are removed.

Expected

If memory used goes up when variables are added, should eventually go down or drop when variables are removed.

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