Serious Graphical Issues in Build but not in Editor

Hello all,
This has been an issue plaguing our team for over a month now, and has basically halted all of our progress. In the editor, the game looks fine, no graphical issues, however, when making a PC, Mac, and Linux standalone build, we get tons of seemingly random graphical issues. Here is a video demonstrating the problem:

We are using the standard render pipeline, and unity 2019.3.13f1 (planning on upgrading to the LTS version soon). We are using quite a few asset store models, and the scene has a lot of objects in it. What I have found so far is that reducing the number of materials in the scene seems to fix the problem. I changed many of the materials of objects in the house to a standard grey material and the problem went away. I’m not sure if this means it is a problem with the number of unique materials (which there are many), some sort of conflict with certain materials, or some conflict within the shaders. We are not getting the error saying that we have reached the maximum number of shader keywords.

If you have any further questions about the project, just let me know. We would appreciate any information or ideas as to why this is happening. Thanks for the help!

Hi!
This looks like the problem discussed here: Bug: 4GB limit to Textures in standalone build