XDM Corrupting .zip Files

[RABIDYOTE]

It seems like XDM is corrupting some .zip files I download. It doesn't seem to happen to all of them, and I'm not exactly seeing a correlation on what the cause could be except maybe the source of the downloads, which is the same website: https://cattailsgame.com. All files I try to download from this site are corrupted and unopenable. Windows Explorer just says that the file is invalid, and 7-Zip says the .zip is not an archive (screenshots below). However, when I download them normally through my browser, they open and extract just fine in either program. Is this an issue on my end, or is this an issue with the program itself instead? I am using the 8.0.26 beta version.