How to reproduce:
1. Open the attached project "steven-mess-around.zip"
2. Enable Holographic Remoting for Play Mode (Mixed Reality>Remoting>Holographic Remoting for Play Mode)
3. Enter Play Mode
4. Exit Play Mode
5. Repeat step 3

Reproducible with: 1.8.0 (2021.3.27f1), 1.8.1 (2021.3.27f1, 2022.3.3f1, 2023.1.2f1)
Could not test with: 2023.2.0a21 (compilation errors in the Console window)

Reproducible on: Windows 10

First few lines of Stack Trace:
0x000001B06E03E650 (Mono JIT Code) (wrapper managed-to-native) object:wrapper_native_00007FFCA096A050 (intptr)
0x000001B07482F9CD (Mono JIT Code) WinRT.ObjectReference`1<Microsoft.MixedReality.QR.IQRCode/Vftbl>:Finalize ()
0x000001B06E083800 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
0x00007FFC6081F1E0 (mono-2.0-bdwgc) [c:\build\output\unity-technologies\mono\mono\mini\mini-runtime.c:2849] mono_jit_runtime_invoke
0x00007FFC607A2AC2 (mono-2.0-bdwgc) [c:\build\output\unity-technologies\mono\mono\metadata\object.c:2921] do_runtime_invoke
0x00007FFC60804E56 (mono-2.0-bdwgc) [c:\build\output\unity-technologies\mono\mono\metadata\gc.c:347] mono_gc_run_finalize