by Rob Johnson.
The (2.2) refers to the legacy assignment types prior to the release of 2.3. I think from the log entry you reference in your original post, you are using the 2.3 version.
MDL-26969 is an issue with the legacy upload types. It is fixed on my 2.3.2 production site. I have confimed MDL-35963 on my site with the new assignment module.