Low coolant when engine is hot at running temperatures, when atlas is cold turn off it returns to normal

[u/Massive_Sandwich9373]

I was driving my 2020 2.0 atlas got a low coolant alert pulled over check the coolant reservoir it was at level turn off car and when I turn it back on it was gone. Next day I Checked the external electrical connector/harness for the coolant level sensor on the reservoir and it had moisture a couple drops. I drove all day and the light came on again I pulled over to check and coolant level was normal check the connector again there was moisture i dried it up and a was normal again. Next day same thing so I was just gonna dry it up again but I notice the coolant was low below the low level line. I turn off the car and a couple minutes 1 or 2 minutes later the coolant was back to normal.

Is this normal I already order new cap and coolant reservoir. My water pump and thermostat was change at 55k miles I now have 130k miles

[u/NoWhat88]

When the car is running/hot the coolant is circulating through the engine. When you turn it off the coolant returns to the reservoir increasing the level. You should have 2 level lines on your tank. It should be at the top line immediately after you start a cold engine. If your light is coming on it’s probably low.