Bump for this issue, or very similar issues. My Roku Premiere+ that worked fine up until the November update has trouble connecting to the network and when it does randomly connect it has "Poor" signal strength and low performance. Phones, other streaming devices, etc. placed in the exact location have excellent wifi signal and performance. It is about 5 feet from the access point with nothing but air in between. Rebooting everything, switching channels, moving it around, and all the other suggestions on the site do not change anything.