I used to work in a really big project written in C and C++ (and even some asm in there) and the build was non-deterministic. However the funky part was there was a C file in all of this that had a couple dozen of commented nee lines with a line at the top saying: ‘don’t remove this or the build will fail’ That remains my favorite code comment to this day.
This doesn’t make that behavior any less scummy, but have you tried using any Google website on a browser that isn’t chrome?