Alright, cool, I don't know for sure, but maybe the temperature was/is too hot/cold and he feels most comfortable in the water. I've read mixed things about heating lamps, instead I've read sticking one or two heating pads to one side of the enclosure gives the frog a choice of temperature to choose from and may be best. If you're interested in trying that here's an amazon link to the heating pads I use. I also have this humidifier running on low every 15 minutes every hour.
Also I might be doing something wrong but I could only see one picture not two