S3 metadata missing in 8.8.0+

[jabeler]

Describe the bug
In 8.8.0+ parts of the existing S3 metadata cannot be viewed, and making changes to files will overwrite/remove the existing metadata.

To Reproduce
Steps to reproduce the behavior:

View the metadata for a file stored in S3 in 8.7.2 and compare it to what is shown in 8.8.0.

Screenshots

Version 8.7.2

Version 8.8.0

Desktop (please complete the following information):

• OS: macOS
• Version: 14.4

[dkocher]

Regression from 51d46a0.

[drbuckyballs]

We have discovered a similar issue. I don't believe it's resolved.

When copying multiple files for example .jpg and .mp4 together from dropbox to s3 bucket.

then cyberduck just changes the metadata values to octet/stream for all files instead of maintaining its original metadata values which should have been image/jpeg for the jpg files. That's a big issue for us.

Issue on windows and latest cyberduck version.

content type should have been image/jpeg
We need to manually change this back on thousands of images.

@ylangisc