WeTransfer Downloads not working properly
Hello, we have a Sonicwall TZ400 and experience something very weird. Whenever our users are trying to download something from WeTransfer the download speed varies massively. Sometimes a 1 GB File takes 2 minutes (rarely), sometimes an hour, and sometimes 7 hours. I can try the same download on the same machine in parrallel and have this experience. When connected directly to our ISP router this issue does not happen and every 1GB File gets downloaded within 2 minutes. It also doesn't happen on any other website (as far as we have noticed).
I have tried disabled every security feature (Gateway AV, IP, Anti-Spyware, CF) but still this issue persists.
We are not using DPI-SSL.
Any Advice would be greatly appreciated.