Woocommerce download speeds for customers got slower

Hello,

so currently I’ve a small problem. The download speed on my woocommerce store for digital products is a bit slower as it should be. For example downloading a video from my store myself i get 4 Mbit download speed, it should be if I download at foll speed around 8,5 Mbit. Something on the server is throtteling the download, but I did not change anything nor do I know what to change.
The server is a dedicated one with a 1 Gbit up & down connection. I don’t know when the downloads slowed down but at the beginning a year ago I could download at full speed.

So my question is, is there a setting (maybe php?) to change it, it seems the speed is limited on purpose or something is limiting it.

PS: This is the second post about this problem. On the first one I was asked to ask the hosting proivder to check if something changed. So far nothing changed and they could not find any issue, also the 1 GB up & down speed are working as they should.

Best regards

exxis