Hello @Андрей Михалевский ,
Thanks for your query.
1.Where did you put your VHD locations, local server, share folder or Azure file share?
2.How long will the black screen last? Will it be mitigated if you resize the file server that hold fslogix profile?
3.Will the issue be reproduced if you disable fslogix?
4.What's the version of your fslogix? Will the issue be resolved if you downgrade to FSLogix 2004 (2.9.7349.30108)?
5.Did this issue happen for all users?
6.Did you install OneDrive and configure FSLogix Profile Container and Office Container?
You may check the following post for reference:
https://video2.skills-academy.com/en-us/answers/questions/190586/windows-server-2019-onedrive-windows-known-folders.html
Best regards,
Leila
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