The logs are showing connection closed from the server end and in some cases connection refused.
Perhaps they are limiting the number of connections that can be made to their servers from the one machine and throttling?
Try configure your monitors so there is more time between checks and see if you have more luck.
@Ovw9 - They havnt changed streaming protocol. Which models are you having troubles with? Please provide debug logs.
From CRS @ 03 Jan 2020 10:01