Following this thread. I've got an 1810-48G in service that likes to randomly dropped ports as well. Updated to latest publicly available FW about a month ago but the issue persists. Going to contact HP support for FW 1.21 as per kestrel1's suggestion. I hope this issue can be resolved as the price and features are right and I would like to use this switch elsewhere, but I'm hesitant after the experience we've had with it.