User export in Excel broken in Moodle

My Moodle user reports (generated by bulk user actions) are broken. When I download an Excel file of a list of users, the file I get is riddled with wrongly encoded data. For example: ![Screenshot of the worksheet][1] A little further in the file, it does show some data as you can see, but this is absolutely not easy to read, nor acceptable to offer to my client. I've already checked the headers this report sends, and those are normal (application/vnd.ms-excel). This is on version 2.0.3 of Moodle. Any help is greatly appreciated. [1]: https://i.sstatic.net/PS9F4.png