Thermostat issue?

[u/bones10145]

I've recently had a problem with the AC intermittently not turning on the outside unit, just the inside fan. If I turn off or set the temp to higher than the current temp and then turn it back on, everything works fine. It only does this once every couple of days. Had an AC guy out here change a contactor but that didn't help. Is this a nest software issue perhaps? It's been installed since 2022.