How to reproduce:
1. Open the attached "1245368 repro" project
2. Open "Test" Scene from Assets > Scenes folder
3. Open Addressable Groups window from Window > Asset Management > Addressables > Groups
4. Set the Play Mode Script to Use Existing Build
5. Make a new build by clicking Build > New Build > Default Build Script in the Addressables Groups window
6. Enter Play Mode

Expected result: no warnings are generated in the console
Actual result: warning messages about a leak appear

Reproducible with: 2018.4.24f1, 2019.4.2f1, 2020.1.0b14, 2020.2.0a16

Notes:
-Full warning message: Internal: "JobTempAlloc has allocations that are more than 4 frames old - this is not allowed and likely a leak:
-Sometimes the 5th and 6th steps need to be repeated to reproduce the issue
-Doesn't seem to be reproducible with AudioClip or Prefab Assets
-The Texture references can be split among several GameObjects but the issue also reproduces if all of them are referenced on a single GameObject
-The Scene must reference more than 40 different Textures in order to reproduce the issue, referencing the same texture more than 40 times doesn't cause a memory leak