In an embarrassing turn of events, I discovered that the Windows version of Rising Star 2 has been using the 32-bit build option all along, resulting in many of the memory issues that people have been experiencing (resulting in hard crashes).
Rising Star 2 is my first game for Windows since 2007's Shady O'Grady's™ Rising Star, and my first Windows game using Unity as the engine. I had been working on mobile and web platforms most of the time in between, so technically this is a rookie mistake when it comes to making a Windows game in 2020.