I wanted to share something we ran across in our environment over the last week in case it might help another admin.
We use Google Workspace and Edge as our primary browser on macOS, and in the last week, several users have reported that drag and drop attachments were becoming "corrupted". We discovered that since the release of Edge 110.0.1587.41, if a user has "Show all filename extensions" unchecked in their Finder settings, drag and drop uploads would remove the extension from the file. Enabling the setting resolves the issue. I've sent feedback to Microsoft.