Virtual Player Editors Crash on SourceAssetDBWriteTxn::Run when entering the Play mode

Reproduction steps:
1. Open the attached project "CrashRepro"
2. Open the Multiplayer Play Mode window (Window > Multiplayer Play mode)
3. Enable Virtual Player 2
4. Wait until it is Active and Enter Play mode on the Main Editor

Expected result: The Play mode starts
Actual result: Virtual Player 2 Editor crashes

Reproducible with: 0.2.0, 1.0.0, 1.2.0 (6000.0.9f1)

Reproducible on: Windows 10, Windows 11
Not reproducible on: No other environment tested

Note: Deleting Sirenix plugin stops the crash

First few lines of stack trace:

0x00007FFB1FEBA8FC (Unity) SourceAssetDBWriteTxn::Run
0x00007FFB1FC5B48D (Unity) ShaderCompilerClearIncludesCache
0x00007FFB1F6C1301 (Unity) DoShaderImportProcessing
0x00007FFB1F6CEEB6 (Unity) ShaderImporter::UpdateShaderWithSource
0x00007FFB1F6C103B (Unity) ShaderImporter::CreateShaderAssetFromScript
0x00007FFB1DE83F83 (Unity) ShaderUtil_CUSTOM_CreateShaderAsset