Brown spots of my Sunbeams scales

[lowryt96]

So I ordered a Sunbeam snake online, and she was delayed in the mail for 5 days. I didn’t get a good look at her going into the enclosure, as I wanted her to be able to destress since they are very prone to stress. Yesterday I took her out for the first time to do a health check, and noticed she’s got brown spots on her scales. A large patch on her tail and small single scale spots throughout her body. I’ve started betadine baths once a day in case it’s bacterial. Her humidity has been at a solid 80-95%. 85° hot spot and 78° cool side. She’s in 2 1/2 inches of damp eco earth right now, but she was in over 6 inches up until yesterday. I cleaned and sanitized her tank yesterday and put only one brick in her 20 gallon tank so I can monitor her more easily. Any ideas on what this is or how I could treat it?