"working on it" file save delay when downloading photos within Microsoft Edge

After several years of downloading photo files via Microsoft Edge, and with Directory Opus as my default file manager, I recently began seeing file download delays with the message "working on it". After 10 or 20 seconds the download completes, but this is happening more and more often. Previously photo file downloads were almost instantaneous. Any solutions?

I'd be surprised if Opus played an active part here. Sounds more like an underperforming Antivirus program. Could you post a screenshot of the message?

Opus has no interaction with how Edge downloads file.

Thanks. Probably a Microsoft File Explorer issue.