Reproduction steps:
1. Open attached project "Case_1270230"
2. Build and deploy the app to a device
3. In the build click the button labeled "Step 1."
4. Click the buttons "Step 2.", "Step 3." and "Step 4." in that order
5. Click the button "Step 5."
6. If the crash does not occur, repeat from the 4th reproduction step

Reproduces on: 2019.4.2f1, 2019.4.13f1, 2020.1.0a5, 2020.1.11f1, 2020.2.0b8
Not reproducible with: 2018.4.28f1, 2019.4.1f1, 2020.1.0a4
Could not test with: 2021.1.0a3 (app crashes upon clicking any of the buttons)

First lines of the stack trace:
* frame #0: 0x0000000102dcd9cc UnityFramework`il2cpp::vm::LivenessState::AddProcessObject(object=0x0000000200000000, state=0x000000010dd136c0) at Liveness.cpp:336:24 [opt]
frame #1: 0x0000000102dcd708 UnityFramework`il2cpp::vm::LivenessState::TraverseGCDescriptor(object=0x00000001078a14e8, state=0x000000010dd136c0) at Liveness.cpp:211:17 [opt]
frame #2: 0x0000000102dcd570 UnityFramework`il2cpp::vm::LivenessState::TraverseObjects(this=0x000000010dd136c0) at Liveness.cpp:148:13 [opt]
frame #3: 0x0000000102dcde50 UnityFramework`il2cpp::vm::Liveness::FromStatics(state=0x000000010dd136c0) at Liveness.cpp:491:25 [opt]
frame #4: 0x0000000102459238 UnityFramework`::GarbageCollectSharedAssets() [inlined] MarkManagedStaticVariableRoots at GarbageCollectSharedAssets.cpp:633:5 [opt]

Notes:
1. The issue requires Social.LoadUsers() to return at least one user
2. Usually crashes within 10 tries to change the Scene

Reproducible with:
iPhone 6 (iOS 12.4.8)
iPhone 7 (iOS 12.3.1)