GL-SF1200: Latest Firmware Update (3.218) Impacts Speed?

I just upgraded the firmware on my GL-SF1200 to version 3.218 and my internet connection has become slower. I have an 80 mbps connection and I was able to use it at full speed before (on firmware version 3.216). But after the firmware upgrade to 3.218, the speed has come down to 15-20 mbps.

How can I troubleshoot this?

Hi,

First confirm test with a direct connection (not through the SF1200) by a PC to see if that connection/interface has 80mbps.

Please compare these two different firmware, and post some speedtest screenshots here of them.