Thermostat Won't Shut Off A/C

My Wyze thermostat has been installed for a few months. This whole time it has seemed to work pretty well. That was until the past couple of weeks. Now, it will say it is 78 in my house and cooling to 73 in 3 mins. Great, sounds good. However, 30 mins later it is still running and says 73 cooling to 73 in one min. But then it keeps running. I have to manually turn it off in the app to get it to stop. The problem seems to keep getting worse and I hate to see my electric bill. Anyone else having this problem or have a solution? It used to work fine, but not lately.