Since the last firmware upgrade of the RV180w I seem to have lost the option to use jumbo frames. I used to have 4k frames on my NAS and 9K on my workstation which worked fine and increased the throughput, after the latest firmware upgrade I get dropped connections or no connection at all. All cabling is Cat6a and speed is 1G so that should be a problem. Does the build in switch stop jumbo frames from being transmitted?