Cannot share files across different networks

[Kepler]

Hello.
First of all, thanks for all the hard work!

I have tried to share a file between my PC and my Phone (using 4G network) just to check how it works.

1 - Open https://www.sharedrop.io/ on the PC
2 - Click the + sign in order to get the QR Code
3 - Scan the QR code from the Phone
4 - Open the link in the Chrome browser
5 - From the PC > Send a file to the Phone

Result: Nothing happens. There is no receive pop-up, only the send pop-up.

Note that it works on the same WIFI, but not on different network.

Thanks!

[kevev]

Same issue here with Chrome.