Unity Editor Freeze On Application.UpdateScene

Hey, i am facing a problem causing the editor to freeze on Application.UpdateScene after opening the project and move on it windows for sometime. i have to end task the editor and open it again. this start to happen without any reasonable reason as the project was working fine. i waked up next day open it then boom this problem start. i have tried many editor LTS versions still same issue. also tried to delete and re-import all project files still same. (note it happen without even clicking on play). i had the same problem with different project but i manage to fix it by reverting the scene file throw source control but i can't fix it on this project.

i will go crazy cause of it and i am trying to fix this for 2 weeks now. kindly help me !!!

Editor Version : 2020.3..20 (LTS)

Version Control : Plastic SCM

Editor Logs: Attached link text Screenshot:

Package Manager Logs :

[2021-10-21T16:00:11.124Z][INFO] Command-line: E:\\Unity\\UnityEditor\\2020.3.20f1\\Editor\\Data\\Resources\\PackageManager\\Server\\UnityPackageManager.exe -s 7356 -p 53013 -l 2 [2021-10-21T16:00:11.132Z][INFO] Creating server instance [2021-10-21T16:00:11.177Z][INFO] Starting Server [2021-10-21T16:00:11.183Z][INFO] Server started on port [53013] [2021-10-21T16:00:11.534Z][INFO] GET '/health' <-- Request received [2021-10-21T16:00:11.536Z][INFO] GET '/health' --> 200 (2 ms) [2021-10-21T16:00:14.500Z][INFO] GET '/project/registries' <-- Request received [2021-10-21T16:00:14.515Z][INFO] GET '/project/registries' --> 200 (14 ms) [2021-10-21T16:00:16.936Z][INFO] GET '/project/registries' <-- Request received [2021-10-21T16:00:16.941Z][INFO] GET '/project/registries' --> 200 (4 ms)