Reproduction steps:
1. Create new 2D URP template project (without sample scene)
2. A prompt to upgrade materials will pop up -> Press "OK"

Expected result: there are no errors or warnings in the console
Actual result: "Calling Deallocate on pointer, that can not be deallocated by allocator ALLOC_TEMP_MAIN UnityEditor.EditorApplication:Internal_CallUpdateFunctions ()" warning is thrown in the console

Reproducible on Ubuntu 20.04
Not reproducible on Windows 11

Reproducible with: 2022.1.0b8, 2022.1.0b9
Not reproducible with: 2020.1.13f1, 2022.1.0b7, 2022.2.0a5
Could not test with 2019.4.36f1, 2020.3.30f1 (no 2D URP template without the Scene)