GivEnergy Monitor for Android

I have the app running on an Samsung Galaxy v9. It seems to lose connection periodically. This could be a problem if it fails to start a timed charge slot. It seems to be random and anywhere from 5 - 30 minutes.

Poor connection can be a number of causes. Most likely is wifi issues. A free app called pingtools is very useful for tracking down network issues, although needs technical knowledge.
If all else fails, a repeater may help. https://givenergymonitor.co.uk/repeater.html