Hey all, I've posted this as a bug here: https://fogbugz.unity3d.com/default.asp?1202878_j8tr84n1unjrtihk But am hoping that someone else may have found a workaround for this issue. Initially I tried converting my project to use LWRP, everything will "work" in there however on entering play mode each time it will put this message in the editor log: Reloading assemblies for play mode. Begin MonoManager ReloadAssembly Symbol file LoadedFromMemory doesn't match image C:\Users\Andrew\Documents\Horse Academy 2020\Library\PackageCache\email@example.com\net35\unity-custom\nunit.framework.dll And then take around 5 minutes to finish doing that before entering play mode. With the LWRP / URP packages disabled it enters play mode immediately. Any workaround no matter how hacky would be great for now until the bugs investigated as we're in a bit of limbo right now until I can figure out how to get it sorted.