We recently had internet installed from Spectrum. At first we were set up with just a modem and a DHCP public IP and everything was working fine. We requested a static public IP so Spectrum installed a router and gave us a static IP. Since that time most files we try to download via Dropbox links fail. Sometimes they will download if we connect directly to the router rather than through our 48 port network switch but even then they sometimes fail. All other downloads (Google Drive, Hightail, etc.) seem to work fine. I've tried different computers and different browsers all with the same result. We still have our internet from a different provider and I'm able to download files from Dropbox links just fine.
Any ideas would be appreciated. Thank you.