This may not be new but I've been using the performance tab of Task Manager and Resource Monitor more since there seems to be some anomalies with LR 8.4 and the Nvidia GPU. While importing new pictures, building the 1:1 previews seemed to be slower than normal. When I checked Resource Monitor, I noticed Lightroom was using the network to communicate with ec2-35-160-46-157.us-west-2.compute.amazonaws.com. This was weird to me since I am not syncing with the Adobe cloud or anything else that should be accessing the cloud. The only possibility I can think of is I do have "Automatically check for updates" enabled.