What are the dimensions of the tub that your BP is roaming in? The tub in the photo looks too small for a snake that size.
If you recently moved your snake to a new enclosure it's normal for them to spend the first week or two roaming a lot in their enclosure at night because they are in an unfamiliar environment and want to explore it thoroughly, or maybe find their old home. After the adjustment period passes the snake should calm down. Roaming itself as a behaviour is fine as long as it only happens at night and the snake is not rubbing its head or nose and hurting itself trying to escape.
You can try adding more clutter such as fake foliage from pet stores or dollar stores, rocks, toilet paper tubes, and fake branches (or real ones, as long as they are hard wood and disinfected by baking at 200F for at least an hour) to provide enrichment for your BP.
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