Owncloud 10 - IE 11 destroys files during upload

When I use the Internet Explorer 11 upload a file (docx, zip) and then download it again, I can not open this file because it's destroyed.
With other browsers (Mozilla, Edge) it works, but unfortunately not with the IE11.

Does anybody have the same Problem?

Unfortunately is in the Owncloud log nothing. It's likely a stupid question, but is an downgrade from Owncloud 10 to 9.1 possible?

I have installed the Owncloud Server

Please note this is a user-based support forums. If something like this is happening after an upgrade to the next major release its most likely a bug which should be reported to the developers at https://github.com/owncloud/core/issues

There is no possibility to do downgrades without reverting to a previous database and file backup before you did the upgrade.

Downgrading is not supported and risks corrupting your data! If you want to revert to an older ownCloud version, make a new, fresh installation and then restore your data from backup. Before doing this, file a support ticket (if you have paid support) or ask for help in the ownCloud forums to see if your issue can be resolved without downgrading.

-> https://doc.owncloud.org/server/latest/admin_manual/maintenance/upgrade.html



Ref: https://github.com/owncloud/core/issues/27830