Is this normal? ICS-027BW

Hi all, I’m Cadenza, 36M from the Netherlands, and I own a Large Kamado.

I recently bought a ICS-027BW, and today I’m using it for the first long session.

I set it up to get to 115C, and checked it after a while to see it at about 75C, and the fan at 100%.

I walked outside, to check, because I expected it to have hit the 115 for a while now, and I saw the temp suddenly go to 135 on the app, and the fan to 0%.

I’ve seen more issues (older posts) with this model, but they dont seem similar. I suspect more of a connection loss? is this normal behavior? I was home all the time, and the phone just lay on the counter.

The image below shows the temp increase of >60C in an instant.