Oven steam function inconsistent or not working

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APO- No steam at all?

Hello APO community, I am cooking a chuck roast in the APO, first time using the oven. 24 hours, 135deg F, 100% humidity, sous vide mode. When the cook started it got really steamy right away, but after a few minutes the steam appeared to have stopped. I thought it was because it was just maintaining the humidity. Well, I am now about 20 hours into the cook and the water level in the basin has not dropped at all, there appears to be no steam in the unit, and the meat looks more like beef jerky …