Hi,

Thanks for reporting.
Could you please share more information with us, to narrow down the issue at our end.
1) Are you using large/heavy size files in Dreamweaver, can you specify the size of files you are using
2) Does this issue happens while opening and navigating between, different file types or specific file extensions in Dreamweaver.
3) Are you opening files from local drive or from any network location
4) How many files at least should be opened for the issue to be reproducible, while you navigate between the files.

Thanks
Dreamweaver Team

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