Smartthings Integration stops working after a few days

Set up the integration with no problem on my original HA install 3 weeks ago. Worked flawlessly for 2 weeks and then last week I lost communication with all the devices. Checked the hub and it was fine, Able to access and control through the Smartthings app.

I uninstalled the integration, got a new API token and everything was back. Worked for another week and then tonight had the same thing happen. Uninstalled/reinstalled again but this time I just used the token I had generated last week and it worked.

Any idea what’s causing these breaks?