Downloads are corrupted

[dbkr]

Steps to reproduce

1. Send a PDF into a room
2. Download that same PDF

Outcome

What did you expect?

To get the same file back

What happened instead?

Got back a file exactly the same size but with different contents that MacOS can't open and file just says is data: encrypted?

Operating system

MacOS (I was able to repro this on macos but we couldn't repro on linux)

Application version

Nightly 2025071801

How did you install the app?

No response

Homeserver

No response

Will you send logs?

No

[t3chguy]

Sounds like element-hq/element-desktop#2407 - did you mean to file this against web rather than desktop?

[dbkr]

Ah, I just wasn't sure it was desktop-specific at the time but we can move it there if we're sure it is.

[individual-it]

For me this happens both in web and the desktop app also for any kind of file.
Uploaded just a file with text in it.

cat uploaded.txt | xxd 
00000000: 7465 7874 0a                             text.

after download it is this:

cat downloaded.txt | xxd 
00000000: 263f f899 3b                             &?..;

[individual-it]

I've tried fluffychat, so its not a server issue

[dbkr]

Caused by #30330