Strange behaviour all of a sudden

Good Afternoon, I have a 16 month old Male beardy, has been no problem ever with lots of live food to eat and now moved onto Greens mainly with some Waxworms or Mario worms, as about 4 months ago completely went off roaches / crickets / locusts, with his favourite is a waxworm.
However about 1 week ago he has also now gone off his greens, is full of energy and now hates being in his tank, we have always had him out most days and in the summer outside as well, however he now glass surfs and wont eat, neither of which he has ever done before.
I have read maybe mating behaviour but not eating cannot be good for him, any advice or info on how long this may last for as the missus getting worried......
He has 4ftx3ftx3ft tank that he has had for 6 months with basking area / brand new UVB (2 days old) and temperatures as reccomended in all forums, also stopped last week sleeping in his hid and now Lays flat out on a crocodile skull on the top level of his tank (not the basking side).
Hope i have gave all relevant info.
This morning had a large Pooh even though has not eaten.
Trying to upload pic of it now. Any help or ideas.
Many thanks

https://www.beardeddragon.org/useruploads click on XIMG at the top of the message box then click on the pic

What are your temps? Could be its too warm for him. Adult dragons often don't like or need the high temps a baby does.
I'd try around 100F , see if that improves basking and glass dancing