File upload is broken when WebDAV is used

Description:

When Webdav is selected and configured - upload works only partially
.jpg files - "SOME" getting uploaded some not - without any visible logic
.mp3/mp4 files - completely broken - upload stops somewhere between 97-100% then nothing
no errors - message "uploading" just hangs there forever until canceled

After monitoring the log - there are no events posted when file hangs ...

Steps to reproduce:

1. Configure uploads with WebDav
2. Upload an .mp3 or .mp4 file

Expected behavior:

File is uploaded and visible in message of the user

Actual behavior:

nothing happening - message "uploading file ..." stops at last few percent (sometime even at 100%)
without any message actually being posted or file uploaded to the webdav

Server Setup Information:

• Version of Rocket.Chat Server: 2.17.7
• Operating System: Ubuntu
• Deployment Method: as described in install docs
• Number of Running Instances: 1
• DB Replicaset Oplog:
• NodeJS Version:
• MongoDB Version:

Client Setup Information

• Desktop App or Browser Version:
• Operating System:

Additional context

Relevant logs:

No source file or test is named. Start by reproducing the issue with WebDAV configured and an MP3 or MP4 upload, then trace the upload path when progress reaches 97–100%; done means the file reaches WebDAV and the message is posted successfully.