Thanks, so we can rule out changed IP addresses.
A workaround:
@ Pro 2019:
Install the Net Scan app
Add a “TCP Port” device
Enter your router’s IP address
Enter the port, either 80 or 443 (just test which one connects)
Now you can restart the Homesh app(s) automatically when Homey has (re)established the connection with your router
(FlowComments is just an example app name):

