Crash on UnityEngine.XR.OpenXR.Features.OpenXRFeature:Internal_GetEnvironmentBlendMode when exiting Play mode

Reproduction steps:

1. Open the user attached project "open-brush.zip"
2. Enter and exit the Play mode

Expected result: Play mode was exited
Actual result: Crash

Reproduced with: 1.8.1 (2023.2.0b3), 1.8.2 (2021.3.30f1, 2022.3.9f1, 2023.1.12f1, 2023.2.0b8, 2023.3.0a4)

Reproducible on: Windows 10
Not reproducible on: No other environment tested

First few stack traces:
0x000002326396a527 (Mono JIT Code) (wrapper managed-to-native) UnityEngine.XR.OpenXR.Features.OpenXRFeature:Internal_GetEnvironmentBlendMode ()
0x000002326396a47b (Mono JIT Code) [OpenXRFeature.cs:322] UnityEngine.XR.OpenXR.Features.OpenXRFeature:GetEnvironmentBlendMode ()
0x000002326396a3bb (Mono JIT Code) [App.cs:46] TiltBrush.BlendController:ForceBlend ()
0x000002326396821b (Mono JIT Code) [App.cs:819] TiltBrush.App:Update ()

Notes:

• Can’t reproduce on Player
• The issue does not crash if Oculus headset is not active