I have had a smartthings hub for many years and have started using it more in the last couple years. I have 30+ devices connected to it. I recently had several devices go offline and never come back on. I have successfully removed a few of them and readded them. I had to force delete them using the https://graph-na04-useast2.api.smartthings.com/ tool.
I have re-added one of my outlets and it is showing about a 95% message to device failure rate, is this a concern? Could this be causing issues with my switch not functioning through the mobile app? What can I do to get this device back to a healthy state?