Hi @Olesia Ved
According to your description, I have the following questions to confirm with you:
Do other users in your organization also have this issue?
Does the Teams web client have this problem? Please try using the web version: https://teams.microsoft.com/.
For call issues, we recommend that you use Call Analytics and Call Quality Dashboard (CQD) to troubleshoot. Both tools are available in the Teams admin center. Follow the methods below.
For more details, you could refer to this article.
Call Analytics:
Go to the Teams admin center. Under Users, select user and then open the Meetings & Calls tab on the user's profile page.
Call Quality Dashboard:
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