Cannot download all files at once in Edge browser

[AdamosD7]

Unfortunately, I encountered a situation where it is not possible to compress multiple files into one .zip and share it. So I was forced to upload around 500 files and then download them after the transfer. I encountered a situation where I marked all 500 files and downloaded them, it always downloaded around 250-400 files, then the download stopped. Even I tried to download less files 150,100 and 50 but always same problem. This happens when I use Edge browser. If I download the files from the firefox browser, all 500 are downloaded without any problems.
If I turn on the private window in Edge, the files also download fine. Unfortunately, only Edge without a private window is available in the transfer destination. So could I ask for some advice on my problem?

This problem could be replicated in your demo.

[AdamosD7]

I think this problem could be solved by using a timeout between individual downloads. Could I ask for guidance on a script that takes care of downloading multiple files at once?