@KA SAN CHAN Welcome to Microsoft Q&A Forum. Thank you for posting your query here!
Yes this is an expected behavior!
For more information refer to this article: https://learn.microsoft.com/en-us/azure/storage/file-sync/file-sync-troubleshoot?tabs=portal1%2Cazure-portal#sync
Kindly let us know if you have any further queries. I’m happy to assist you further.
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